4 years ago

When electrons gain energy, what can they do?

Chemistry

1 answer:

beks73 [17]4 years ago

3 0

B. When electrons gain energy, they have the power to move up to a higher energy level in an atom.

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Which element has a smaller atomic radius than strontium (Sr)?

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3. Explain why an aluminum ion (A13+) is smaller than a sodium ion (Na+).

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Which substance is a base? HCOOH RbOH H2CO3 NaNO3

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For this question, we have to remember what is the definition of a base. A base is a compound that has the ability to produce hydroxyl ions $OH^-$ , so:

$AOH~->~A^+~+~OH^-$

With this in mind we can write the reaction for each substance:

$HCOOH~->~HCOO^-~+~H^+$

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The only compound that fits with the definition is $RbOH$ , so this is our base.

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