Which statement correctly describes the reactivity of noble gases, according to the octet rule?

Their atoms have one electron in their valence shells, so noble gases are very reactive.
Their atoms have eight electrons in their valence shells, so noble gases are very unreactive.
Their atoms have one electron in their valence shells, so noble gases are very unreactive.
Their atoms have eight electrons in their valence shells, so noble gases are very reactive.

Answer:

mass

Explanation:

As given by the law of conservation of mass. Hopes this helps!

Answer:

Alkali metals

hope it helps

Answer: 0.0556555468903552 moles, you can estimate that to its nearest hundreth, or thousandth.

Explanation:

im just naturally a genius

Answer:

D)a burning natural gas releases 21,000 kj

Answer:

Chitin

Explanation:

A fly's main body is made of a thorax and an abdomen. These parts are covered by a hard exoskeleton made of a bony substance called chitin.

The exoskeleton of a housefly is made up of chitin. Thus, the correct option for this question is B.

The Exoskeleton may be defined as a tough and rigid external covering present in some invertebrate animals like arthropods. It supports and protects the animals with respect to their external environment.

The main body of a housefly is significantly divided into two regions, i.e. a thorax and an abdomen. The thorax region is further divided into three parts i.e. prothorax, mesothorax, and metathorax.

All these parts of a housefly are remarkably covered by a tough exoskeleton that is constructed of chitin. The housefly has a hard exoskeleton that protects it from moisture loss.

Therefore, the exoskeleton of a housefly is made up of chitin. Thus, the correct option for this question is B.

To learn more about Exoskeleton, refer to the link:

https://brainly.com/question/1619995

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Answer:

observation

Explanation:

hope it is correct

Answer:

Inference science

Explanation:

Your inferring that the horse is hungry. The word 'probably' infers that the horse may be hungry.

Answer:

The three major types of intermolecular interactions are dipole–dipole interactions, London dispersion forces (these two are often referred to collectively as van der Waals forces), and hydrogen bonds

answer : the correct option is, (B) 2, 3 and 6.

Answer:

b

Explanation:

i took the test

Answer:

B

Explanation:

to find how many moles we have you need to use the molarity equation which for this is

40g * (1mole/200g) = .2 moles

Given we know that we have .2 moles

then all you have to do is divide amount of moles by amount of liters to find the molarity

for this problem it is

.2mol/2L which is .1 M

Answer: 2.856km

Explanation: 1000m = 1km

2856m / 1000 = 2.856km

Answer:

In order to develop a healthy, working hypothesis it's best to work within the lines of: If _______, Then ______, as an act of if, being the input (independent) variable and then being the output (dependent).

Answer:

the cheta

Explanation:

kinetic means movement

Answer: Atoms aren't entirely empty space

Explanation:

Rutherford did his scatter experiment to disprove Thomson's Plum Pudding Model. Rutherford shot helium nuclei at a sheet of gold and expected the particles to all go straight through to a sensor. The reason he expected this was because Thomson said that atoms are mostly made of empty space. Not all the particles went through the gold sheet, a lot of them actually reflected back to him. This meant that atoms aren't entirely empty space and something had to deflect the helium nuclei

Answer:

malleability

Explanation:

Answer:

The answer is Malleabillity

Explanation:

I took the test and got a 100% on Edge

Please give star or Brainliest <3

Answer:

[tex]3.2\times 10^{-18}\ C[/tex]

Explanation:

No of electrons, n = 20

We need to find the total charge. We can use quantization of electric charge in this case.

Net charge,

q = ne

e is charge on an electron

[tex]q=20\times 1.6\times 10^{-19}\\\\q=3.2\times 10^{-18}\ C[/tex]

So, there are [tex]3.2\times 10^{-18}\ C[/tex] of charge in 20 electrons.

Answer:

The answer is 15 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density of Chloroform = 1.5 g/ml

volume = 10 mL

We have

mass = 1.5 × 10

We have the final answer as

Hope this helps you

Answer:

4.75 or 4.8

Explanation:

density = mass / volume

57 / 12 = 4.75

from here you can leave it as is or round up.

hope this helps!!

Answer:

D

Explanation:

They don't have define shape nor structure...so a random group of stars and no shape can form a irregular galaxy

Answer:

Na has the most similar configuration.

Explanation:

Na electron configuration: 1s²2s²2p⁶3s¹ or [Ne] 3s₁

Mg electron configuration: 1s²2s²2p⁶3s² or [Ne] 3s²

Be electron configuration: 1s²2s² or [He] 2s²

This is because Na and Mg are right next to each other in the same period (horizontal).

Answer:

Na has the most similar configuration. Na electron configuration: 1s²2s²2p⁶3s¹ or [Ne] 3s₁. Mg electron configuration: 1s²2s²2p⁶3s² or [Ne] 3s². Be electron configuration: 1s²2s² or [He] 2s². Na and Mg are right next to each other in the same period

Answer:

Copy and paste "Electromagnetic waves are categorized according to their frequency f or, equivalently, according to their wavelength λ = c/f.  Visible light has a wavelength range from ~400 nm to ~700 nm.  Violet light has a wavelength of ~400 nm, and a frequency of ~7.5*1014 Hz.  Red light has a wavelength of ~700 nm, and a frequency of ~4.3*1014 Hz." into google, and the correct website pops up as the first result.

Explanation:

I tried to link the website that I use to convert wavelengths and frequencies into types of light, but it deleted my answer, so I guess we're doing it this way. As for converting the wavelength to energy, the same principles apply as before:

Frequency: ν       Wavelength: λ       Energy: E       Speed of light: C (3.00e8)       Planck's Constant: h (6.626e-34)

ν -> λ    λ = C/ν

λ -> ν    ν = C/λ

For either of these equations, wavelength must be converted to meters or nanometers, depending on the equation.

For ν -> λ, after doing the equation, convert the wavelength into nanometers by dividing by 1e-9.

For converting λ -> ν, convert the wavelength into meters by multiplying by 1e-9.

For energy: E = hν = hc/λ

Answer:

True

Explanation:

Volume is measured in "cubic" units. The volume of a figure is the number of cubes required to fill it completely, like blocks in a box. Volume of a cube = side times side times side. Since each side of a square is the same, it can simply be the length of one side cubed.

Answer:

hola, tuve que usar el traductor de google en esto. Ni siquiera sé si entenderás esto, pero vale la pena intentarlo. y la cuestión es que no tengo la respuesta a esto, pero tenía ganas de responder en español :) por favor, responda en español para que pueda responder con una respuesta en español porque ¡esto es divertido! Esta es la tercera respuesta en español que he hecho esta noche y no tengo la intención de detenerme ahora. Sin embargo, me estoy quedando sin cosas que decir. jaja

Explanation:

The thick soil accumulation of fine-grained particles is called as silt

Answer:

Excited state

Explanation: