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3 years ago

Non-metals tend to

Chemistry

1 answer:

IgorLugansk [536]3 years ago

5 0

Answer:

gain, negative

Explanation:

Non-metals tend to GAIN

electrons to be come NEGATIVE

ions.

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Beta particles cannot penetrate very far into solids because they _____.

givi [52]

Answer: Beta particles cannot penetrate very far into solids because they have no mass.

Reason:
Penetrating power of particle depending upon the velocity and mass of particle. Greater the mass and velocity. Higher will be the penetrating power. In case of Beta particles, they are electrons. Mass of an electron is 9.1 X $10^{-31}$ Kg. Due to such negligible mass, they have very low penetrating power.

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ivolga24 [154]

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3 years ago

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What can scientists measure to provide evidence that electrons can move from one energy level to another

andrey2020 [161]

Answer:

recording the wavelength of light

Explanation:

When an appropriate measure of energy say in the form of light of a certain wavelength, is supplied, electrons have a tendency to absorb the energy and get excited to a higher energy level. Conversely, if an electron is already at a higher energy state it will emit energy in the form of light (or heat) and return to a more stable lower energy state.

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4 years ago

A chemical equation frequently indicates all of the following except the...

dalvyx [7]

Answer:

i think the answer is D.

Explanation:

for the chemical equation in all the other answers are true so therefor d is not.

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3 years ago

What is ΔrH° for the following phase change? LiCl(s) → LiCl(l)

Yanka [14]

Answer:

$\Delta _rH=17.51\frac{kJ}{mol}$

Explanation:

Hello!

In this case, since the enthalpy change for any process is computed by subtracting the enthalpy of the final state and the enthalpy of the initial state, for the given phase change, we subtract the enthalpy of the liquid (final state) and the enthalpy of the solid (initial state) considering this a melting process:

$\Delta _rH=-390.76\frac{kJ}{mol} -(-408.27\frac{kJ}{mol} )\\\\\Delta _rH=17.51\frac{kJ}{mol}$

Which makes sense because this process absorbs energy.

Best regards!

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3 years ago