Chemistry High School

these are the last 2 questions on my assignment.... please help

Answers

Answer 1

1..orbit

2..7

I hope this was helpful

Related Questions

What is the mass of a hydrogen atom?

Answers

Answer:

1.00784 u

Explanation:

Answer:

1.00784 u

Explanation:

hydrogen atomm

What elements are involved with fission

Answers

Answer:

Several heavy elements, such as uranium, thorium, and plutonium, undergo both spontaneous fission, a form of radioactive decay and induced fission, a form of nuclear reaction.

Mostly serveral heavy elements

A Solution is a mixture of two or more substances_____
O a in water
O b. seperate from one another
O c in the same phase
Od come to room temperature

Answers

Answer:

In the same phase

Explanation:

Because when you make a solution you have to keep them in the same phase or you will oof.

why is the temperature different in different places around world

Answers

Answer:

it is because they are placed geographically different.

what method of cleaning tools and equipment do you follow or apply?

Answers

I clean with a rag wdym

Which of the following factors contributes to the relatively greater atomic size of the higher atomic number elements within a particular family of the periodic table?
a. greater number of energy levels b. larger nuclei
c. greater number of protons d. smaller number of valence electrons

Answers

C. Greater number of protons. Each element has a different number of protons, which is what makes them different, and is how we identify them

Which two formulas represent compounds?
A. Ag
B. HCI
C. H2
D. NaCl

Answers

Answer:

it is A and B

Explanation:

A and b are Sodium chloride and Hydrogen chloride which are both compounds.

HELP PLEASE
Chemical name for As2S3

Answers

Answer:

Chemical name for As2S3 is Arsenic sulfide

Explanation:

Answer:

Arsenic Sulfide

Explanation:

which can occur in a physical changen?

Answers

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

Nuclear chemistry findings contradict __________________ theory of indivisible atoms.

Answers

Answer:

atomic theory

Explanation:

Q5 4.70 g of methanoic acid reacts to form 3.60 g of methanoic
anhydride. The equation for this reaction is:
2HCOOH + (CHO),0 + H2O
Calculate the percentage yield of this reaction.

Answers

Answer:

The anwser is always Jesus.

Explanation:

Things can only go downhill from here

Which percentage is in the appropriate range for a snack to be considered a “good source” of nutrients?

15 percent

35 percent

40 percent

50 percent

Answers

I think 35 percent. Hope this helps!

Answer:

Explanation:

Which substance can be decomposed by chemical means? a. calcium b. argon c. sodium chloride d. aluminum

Answers

Amonia? But I don’t see that being an answer choice. I found this. I hope it helps

Based on the physical properties of elements on the periodic table, which of the
following elements will most likely act as both a conductor and insulator? *
Aluminum
O Sulfur
O Copper
Silicon

Answers

Usad fact copper and sulfur and silicon insulator

1.As with any grid, the periodic table has ________ (left to right) and __________ (up and down).
2.Every row is called a ___________.
3.All the elements in the same period have the same number of _______.
Each column is called a __________.
4.The elements in each group have the _________ number of electrons in the outer orbital (or valence electrons).
5.Noble gases and helium are considered “happy” because their ______________ shell is ___________.

this was not a multiple-choice its about the periodic table

Answers

Answer:

rows and columnsperiodatomic orbitalsvalence electrons

4.similar properties

5.electrons are very reactive

the outermost

Show all work: A metal bar has a length of 5.0 cm, a width of 3.0 cm, and a height of 1.0 cm. What volume of water, measured in deciliters, would this bar displace?

Answers

15 cm

and I have to explain but there's nothing to explain so yea

Why do nonmetals have a higher electronegativity?

Answers

Answer:

Nonmetals have more valence electrons and increase their stability by gaining electrons to become anions.

Answer: Because they are on the father side of the periodic table

Explanation: Electronegativity increases as you move from left to right on the periodic table

Which element’s symbol could replace the question mark in the diagram?

boron (B)
neon (Ne)
rubidium (Rb)
arsenic (As)

Answers

Answer:

D- Arsenic (As)

don’t fail pls :) ✨

The Arsenic (As) element's symbol could replace the question mark in the diagram. Therefore, option D is correct.

What is an electron dot diagram?

An electron dot diagram is a diagram used to represent the valence electrons of an atom in a simple way. Valence electrons are the electrons in the outermost shell of an atom, which are involved in chemical bonding.

In an electron dot diagram, the symbol of the element is used to represent the nucleus and inner electrons of the atom, and dots are placed around the symbol to represent the valence electrons. Each dot represents one valence electron, and the dots are placed on each of the four sides of the symbol (top, bottom, left, and right) before doubling up.

Thus, the Arsenic (As) element's symbol could replace the question mark in the diagram. Therefore, option D is correct.

Learn more about electron dot diagrams, here:

https://brainly.com/question/2115636

#SPJ7

Your question is incomplete, most probably the full question is this:

Which element’s symbol could replace the question mark in the diagram?

boron (B)

neon (Ne)

rubidium (Rb)

arsenic (As)

When fat comes in contact with sodium hydroxide, it produces soap and glycerin. Determine whether this is a physical change or a chemical change. Explain your answer.

Answers

Explanation:

Answer. What comes in contact with Sodium Hydroxide to form soap and glycerine it is a chemical change because you cannot reverse this change and also the products formed are the results of a chemical reaction

Answer:

Its a chemical change because its property is changed.

Explanation:

A compound is always made up of the same ____ in the same proportions.

Answers

Answer:

elements

Explanation:

A compound always consists of the same elements in the same ratio. If the same elements combine in different ratios, they form different compounds

What are some uses we might have for standing waves?

Answers

any waves traveling along the medium will reflect back when they reach the end.

help me please i have it due soon

Answers

Answer:

Explanation:

I think it is B. That is because when you are falling, your just going to fall faster and faster.

I hope this helps!

Answer:

Explanation:

The third force the jumper experiences is a spring force due to the bungee cord. The amount that the bungee cord pulls back on the jumper depends on how far the cord has been stretched, i.e. the farther the jumper has fallen, the more the cord pulls back on him or her.

Which of the following is not a compound? Sulfur, sodium chloride, ammonia, carbon dioxide

Answers

Answer:

Carbon monoxide is a colorless, odorless, and tasteless flammable gas that is slightly less dense than air.

1 point
QUESTION 5: What happens if you reset and place the refrigerator instead
of the wooden box with an applied force fo 200 Newtons for about 3
seconds? *
O The speed of the skateboard increases compared to the wooden box
O The speed of the skateboard decreases compared to the wooden box

Answers

Answer: The speed of the skateboard decreases compared to the wooden box

Explanation: well, umm... if you placed a refrigerator on a skateboard... that will be difficult to move, if anything it will brake the board!

A wooden box is much lighter than a refrigerator

1. Which of the following substances are elements?
(a) bronze
(b) tin
(c) chromium
(d) solder
(e) propane
(1) arsenic
(g) nickel

Answers

B, C, G and F or 1 is what you put

Write a complete, balanced chemical equation where tin metal reacts with aqueous hydrochloric acid to produce tin(II) chloride and hydrogen gas. Include states.

From the equation, which element is oxidized, and which element is reduced?

Answers

Answer:

Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)

Explanation:

The net reaction is Z n ( s ) + 2 H + ( a q ) → Z n 2 + ( a q ) + H 2 ( g ) The C l − ions are spectators - they don't change.

What did electrons from the ionized air do to the oil drops?

Answers

Answer:

The famous oil drop experiment exploits that fact that an oil drop in an electronic field will get negative charge accumulation which can be balanced and observed in order to determine the charge of an electron.

What group will elements in the 7th column bond to?

Answers

Deez Neutz..............Group 1

Find the average atomic mass of smithium ?

Answers

Answer:

google friend tell me

Explanation:

You will have to look up the isotopic distribution of lithium nuclei. ALL lithium nuclei have 3 positively charged nuclear particles, protons, i.e. Z = 3 . These 3 particles give rise to the element's identity. If you take the weighted average of ALL lithium nuclei, we get an average mass of 6.941 g⋅mol−1

What percent of the universe's age is the first 400,000 years?

Answers

Answer:

the globuler cluster

Explanation:

hope this helps maybe next time show anwsers

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