The table below lists three characteristics of an atom of an element

Number of protons:10
Number of neutrons:10
Number of Valence Electrons:8

An atom of which element is described by the data in the table?

The Table Below Lists Three Characteristics Of An Atom Of An Element Number Of Protons:10Number Of Neutrons:10Number

Answers

Answer 1
It’s Neon (Ne)

Explanation
Neon has 10 protons, and 10 neutrons.
How to find neutrons:
The number of mass minus the number of protons. 20-10=10.

Valence electrons are the number on the last shell of energy level, with is 8.
But a easy way to find it is by looking at the group number, the last group number in case 18 only focus at 8. Questions?

Related Questions

How much concentrated 12M hydrochloric acid is needed to prepare 100. mL of a 2.0M solution?

Answers

Taking into account the definition of dilution, 16.67 mL of 12 M hydrochloric acid is needed to prepare 100. mL of a 2.0M solution.

Definition of dilution

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

Ci: initial concentration.Vi: initial volume.Cf: final concentration.Vf: final volume.

Volume of hydrochloric acid needed

In this case, you know:

Ci= 12 M Vi= ?Cf= 2 MVf= 100 mL

Replacing in the definition of dilution:

12 M× Vi = 2 M× 100 mL

Solving:

Vi = (2 M× 100 mL)÷ 12 M

Vi= 16.67 mL

In summary, 16.67 mL of 12 M hydrochloric acid is needed to prepare 100. mL of a 2.0M solution.

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why is it important for scientist to be objective when using the design process like the scientific method when doing their investigations

Answers

Answer:

your mom

Explanation:

grandma + grandpa = mom

A 16.0 g sample of methane gas, CH4, the gas used in a chemistry lab, has a volume of 5.0 L at 27ºC. Calculate the pressure.

Answers

Answer:

4.9 atm

Explanation:

convert 16.0g of CH4 to moles

16.0 g CH4 x 1 mol CH4/16.0 g CH4 = 1.00 mol of methane

convert the temp into Kelvins: 27 + 273 = 300.K

PV = nRT

(P) (5.0 L) = (1.00 mol) (0.0821 L atm/mol K) (300.K)

P = 4.9 atm

A glass tube contains mercury. What would be the height of the column of mercury which would create pressure equal to 1.00 atm

Answers

Since 1.00 atm is equal to 760 mmHg, the height of the column of mercury which would create pressure equal to 1.00 atm is 760 mm or 76 cm

What are the units of pressure?

Pressure is defined as the force acting perpendicularly per unit area of a surface.

The units of pressure include;

millimetres of mercury, mmHgaatmospheres, atm,pascals, PaNewtons per square metre, N/m^2

1 atmosphere is equal to 760 mmHg.

Therefore, the height of the column of mercury which would create pressure equal to 1.00 atm is 760 mm or 76 cm

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Of the following elements, which has the lowest electronegativity?

Br


Cl


Ca


Mg

Answers

The metal with the highest electro positivity has the lowest electronegativity(since electronegativity is the property of non metals). Now Magnssium is more electro positive making it the least electronegative

Put the appropriate processes to their respective bins

Answers

Answer:

Remember

Endo = To EnterExo = To ExitThermic = Heat

A sparkler burning is an exothermic reaction

Sparkler burning is an exothermic reaction and so the sign of the ΔH must be negative (–∆H) indicating that heat was released.

Ice melting is an endothermic reaction (+H) because the ice absorbs (heat) energy, which causes a change to occur.

Acetone evaporating from skin is an endothermic reaction (+H). Because, molecules that are evaporating are absorbing heat. So, evaporation is called endothermic.

A solution contains 5.2 moles of NaCl in 0.5 L of water. What is the molarity of this solution? (Show your work)

Answers

Answer:

10.4 M

Explanation:

5.2 Moles / .5 L = 10.4 M

A stock solution has a concentration of 1.5 M SO2 and is diluted to a 0.54 M solution with a volume of 0.18 L. What was the volume of the stock solution

Answers

The volume of the stock solution that has a concentration of 1.5 M SO2 and is diluted to a 0.54 M solution with a volume of 0.18 L is 0.065L.

How to calculate volume?

The concentration of a solution can be calculated using the following formula:

C1V1 = C2V2

Where;

C1 = initial concentration = 1.5MC2 = final concentration = 0.54MV1 = initial volume = ?V2 = final volume = 0.18L

1.5 × V1 = 0.54 × 0.18

1.5V1 = 0.0972

V1 = 0.0972 ÷ 1.5

V1 = 0.065L

Therefore, the volume of the stock solution that has a concentration of 1.5 M SO2 and is diluted to a 0.54 M solution with a volume of 0.18 L is 0.065L.

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In your own words, define the following terms.
star

Answers

Answer:

A Sun that is hot and big and sparkling

Explanation:

A Star is a Sun which is tended to be true

Answer:

A star is a miniature version of a sun, which burns out over a course of time.

Which statement is an example of competition?

Answers

"I'll win everyone at the camp games this year."

Explanation:

This above statement is an example of competition because it signifies a matter anticipating an upper hand towards some other matter.

What is the mass of 89.6 L of NH3(g) at STP?

Please help I don’t understand!

Answers

Answer:

68g

Explanation:

GMM of NH^3=14+3=17g

Mass =mole×GMM=4×17=68g

hope this helps<33 :)

Name the alkyne. Spelling and punctuation count.
CH
C
H3C-CH2-CH2-CH-CH2-CH2-CH2-CH3

Answers

Answer:

[tex] \boxed{ \sf \: 3-propyl-hept-1-yne}[/tex]

Explanation:

To know the name of Alkyne, use IUPAC(International Union of Pure and Applied Chemistry).

According to IUPAC, for the naming of any organic compound containing a triple bond, find the longest chain that contains triple bond & number the chain from the side where triple bond gets lowest number.

in the above diagram, the parent chain cobtains seven carbon atoms with a propyl substituent at 3rd carbon atom. during naming of the compound mention the substituent first along with the position of carbon where is it. Now 7 carbon Atom have prefix (-hept) and Alkyne group is on the first position hence the parent chain would be (hept-1-yne) and substituent (3-propyl).

hence the name of compound is 3-propyl-hept-1-yne

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what is the volume occupied by 6.8gm of H2S at STP (at mass H=1,S=32)​

Answers

The volume occupied by 17g of H2S at s.t.p. is [H = 1.00, S = 32.0, Molar volume = 22.4 dm3]

Options

A) 11.2dm 3

Below is the thermochemical equation for the combustion of octane.



How much heat is released during the combustion of 8 moles of octane (C8H18)

Question 4 options:

Impossible to answer this question with the information provided.


43,764 kilo joules of heat is released


7,004,224 kilo joules of heat is released


2735 kilo joules of heat is released


87,528 kilo joules of heat is released

Answers

from equation 2 moles = - 10,941 kJ

for 8 moles:

8/2 x -10,941 = -43,764 kJ

-43,764 kJ heat is released during the combustion of 8 moles of octane.

How to find the amount of heat released?

To calculate the amount of heat released in a chemical reaction, use the equation Q = mc ΔT, where Q is the heat energy transferred (in joules), m is the mass of the liquid being heated (in kilograms), c is the specific heat capacity of the liquid (joule per kilogram degrees Celsius), and ΔT is the change in temperature.

from equation 2 moles = - 10,941 kJ

for 8 moles:

8/2 x -10,941 = -43,764 kJ

When octane is burned, carbon dioxide gas is generated, as shown in the reaction equation. This is typical of hydrocarbon combustion reactions, such as octane and propane.

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Marie had to wait at the railroad tracks from a train to pass. How long did she wait?

Answers

Answer:

she waited 30 minutes

Explanation:

  i need brain liest

Which molecule has a trigonal planar shape?

Answers

Answer:

Structure of boron trifluoride, an example of a molecule with trigonal planar geometry.

Explanation:

The cell membrane is a flexible structure that surrounds both plant and animal cells. The arrangement of molecules within the cell membrane makes it semi-permeable. That is, the cell membrane allows some substances to easily diffuse into and out of the cell, but it prevents the diffusion of other substances.

Plant and animal cell diagram


The cell wall is a rigid structure that surrounds plant cells. The materials found in the cell wall protect the plant cells and give plants structural support.

Which conclusion can be made given the above information?

Answers

Answer:

The true answer is the Cell membrane and animal cells invisible

Explanation: nothing. eshh

Name five renewable energy resources.​

Answers

Wind power
Hydro power
Solar power
Biomass
Hydroelectricity

Answer:

Solar energy, geothermal energy. Wind energy. Hydropower, Biomass.

Explanation:

Can you light diamond on fire?

Answers

Answer:

Because diamond is comprised of carbon, it may be set on fire and even burned.

Explanation:

Why cuz diamonds are made out of carbon

Answer:

Why cuz diamonds are made out of carbon

Explanation:

Breathing is one of the most universal and habitual practices that humans do. Most of the time, we don't even think about it. Our lungs allow us to breathe in air and provide much needed oxygen to the rest of the body. It also eliminates carbon dioxide to get rid of this waste material of our body. This breathing process is made possible because of Boyle's law.

In at most 100- word essay, explain how Boyle's law applies to human breathing apparatus and suggest ways on how to take good care of our healthy lungs.​

Answers

Answer:

lets Do it dude

We can breathe air in and out of our lungs because of Boyle’s law. According to Boyle’s law, if a given amount of gas has a constant temperature, increasing its volume decreases its pressure, and vice-versa.

When you inhale, muscles increase the size of your thoracic (chest) cavity and expand your lungs. This increases their volume, so pressure inside the lungs decreases. As a result, outside air rushes into the lungs. That’s because a gas always flows from an area of higher to lower pressure.

When you exhale, muscles decrease the size of your chest cavity and squeeze your lungs. This decreases their volume, so pressure inside the lungs increases. As a result, air rushes out of the lungs, flowing from an area of higher to lower pressure.

Explanation:

Checkmate

If the Ksp of NaCl is experimentally determined to be 53.9, then what is the concentration of Na (in M) when it begins to crystallize out of solution

Answers

For the concentration of Na in M when it begins to crystallize out of the solution is mathematically given as

Na+ = 0.125M

what is the concentration of Na in M when it begins to crystallize out of the solution?

Generally, the equation for the Ksp of the solution is mathematically given as

Na⁺+CL⁻

Ksp = SxS

53.9 = s^2

S = 7.34

Molar mass Nacl 58,44

Solubility = 7.34/58.44

Solubility = 0.125M

In conclusion, the concentration of Na in M when it begins to crystallize out of the solution

Na+ = 0.125M

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For a reaction where ∆H° = +573 kJ/mol and ∆S° = +1.64 kJ/mol・K, at what temperature, in K, does X(l) → X(g) occur spontaneously?

Answers

The temperature in kelvin (K) in which the reaction occurs spontaneously is given as  349 K

What is entropy?

Entropy is simply defined as the measure of the degree of the disorderliness of a system. Mathematically, it can be expressed as:

ΔS = ΔH / T

Where

ΔS is the change in entropy of system ΔH is the enthalpy change T is the temperature

How to determine the temperature Enthalpy change (ΔH) = +573 KJ/molChange in entropy (ΔS = +1.64 KJ/mol・K Temperature (T) =?

ΔS = ΔH / T

1.64 = 573 m T

Cross multiply

1.64 × T = 573

Divide both side by 1.64

T = 573 / 1.64

T = 349 K

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Citric acid is made by oranges. When citric acid dissolved in water , it produces a relatively small number of hydronium ions. Citric is best described as a

Answers

Answer:

Citric acid is a weak organic acid found in citrus fruits.

Explanation:

A 1 kg block of iron sits outside in the direct sun from 8am to 10am. At 8am the temperature of the block was 20.0°C and at 10am the temperature of the block was 27.5°C.
How much heat did the block of Iron absorb from the sun?
use q=mcΔT

Answers

Answer:

About 3.5 kJ.

Explanation:

Recall the heat transfer equation:

[tex]\displaystyle q = mC\Delta T[/tex]

Where q is the heat; m is the mass of the substance; C is its specific heat; and ΔT is the change in temperature.

The given specific heat of iron is 462 J/kg -°C.

Substitute and evaluate. Ensure correct units:
[tex]\displaystyle \begin{aligned} q & = (1\text{ kg})\left(\frac{462\text{ J}}{\text{kg -$^\circ$C}}\right)(27.5\text{ $^\circ$C} - 20.0\text{ $^\circ$C}) \\ \\ & = (1\text{ kg})\left(\frac{462\text{ J}}{\text{kg -$^\circ$C}}\right)(7.5\text{ $^\circ$C}) \\ \\ & = 3.5\times 10^3 \text{ J} = 3.5\text{ kJ}\end{aligned}[/tex]

Therefore, the block of iron absorbed about 3.5 kJ of heat.

specific heat capacity of iron=462J/kg°CChange in temperature=∆T=(27.5-20)=7.5°C

So

Q=mc∆TQ=1(462)(7.5)Q=3500J

The block absorbed 3500J of heat

**Multiple Choice**

**Q:** When an acid reacts with a metal, what is one of the usual products?


(a) carbon dioxide

(b) water

(c) hydrogen gas (this?)

(d) salt

(e) none of the above

Answers

Answer:

When an acid reacts with a metal, what is one of the usual products?

C) Hydrogen gas

Explanation:

HELP ME OUT PLS!!!!!!

During which lunar phase would you observe the highest tides?

A) Phase 1

B) Phase 2

C) Phase 3

D) Phase 4​

Answers

Answer:

3

Explanation:

This is the answer because when it is full moon the tides are higher.

C- phase 3 which I’m assuming is a full moon phase

How many liters of nitrogen gas are needed if 15.9g of aluminum is produced?
please show work

Answers

Answer:

6.6 L    ( if you wrote your Q correctly)

Explanation:

2 Al    + 1 N2   = 2 Al N

Al mole weight = 26.981 gm

   given 15.9 Al    How many L of N2 are needed?

15.9 / 26.981 = .5893 moles of Al

   we need 1/2 as many moles of N2  ( from the balanced equation above)

       = .29465  moles of N2

  22.4 L/ mole   for STP gas = 6.6 L

why is water a clear liquid?

Answers


Water is a Odorless tasteless liquid composed of the elements hydrogen and oxygen. water is a universal solvent meaning that many elements can be dissolved by water.

The equation above is not balanced. Balance the equation on a scratch sheet of paper. Match each letter to the correct coefficient that will balance the equation. Remember, if there is no coefficient, it is understood to be 1. Some numbers may be used more than once.

Answers

In order to balance the equation, A would be 1, B would be 3, C would be 1, and D would be 2 respectively.

Balancing chemical equation

A balanced chemical equation has the same number of each of the component atoms at the reactant and product sides.

Thus, the balanced chemical equation for the reaction in the illustration would be:

[tex]CS_2 + 3O_2 --- > CO_2 + 2SO_2[/tex]

Thus:

A = 1B = 3C = 1D = 2

More on balancing chemical equations can be found here: https://brainly.com/question/15052184

A balloon has a volume of 12.0 L at a pressure of 98.7. kPa. What will be the new volume when the pressure drops to 56.7 kPa?

Answers

Answer:

20.89 LITERS

Explanation:

P1V1=P2V2

P1V1 / P2 = V2

98.7 * 12/56.7 = 20.89 LITERS

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