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Electrons and Atomic Structure

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Questions and Answers

What is the chemical formula for carbon dioxide?

C2O2

C2O

CO2 (correct)

What is the overall charge of the nitrate ion (NO3-)?

-1 (correct)

What is the difference between isotopes of an element?

They have different numbers of neutrons. (correct)

They have different chemical properties.

They have different numbers of electrons.

They have different numbers of protons.

Which of the following is true about carbon-12 and carbon-14?

They have the same number of protons but different numbers of neutrons. Signup and view all the answers

What type of particles can some isotopes emit?

Neutrons, protons, and electrons Signup and view all the answers

What is the charge of a proton?

Positive Signup and view all the answers

In a neutral atom, why do positive and negative charges cancel each other out?

Because the number of electrons equals the number of protons Signup and view all the answers

What type of ions are formed when atoms gain or lose electrons?

Negatively charged ions Signup and view all the answers

What percentage of an atom's volume consists of empty space?

Approximately 99% Signup and view all the answers

How are molecules formed?

By joining atoms through chemical bonds Signup and view all the answers