Ions and Isotopes

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

How do you calculate the mass number of an atom?

Back

The mass number is calculated by adding the number of protons and neutrons in the nucleus of an atom.

Front

If an atom has 10 protons and 9 neutrons, what is its mass number?

Back

19

Front

What charge does an atom have if it gains an electron?

Back

Negative (-) charge.

Front

What charge does an atom have if it loses an electron?

Back

Positive (+) charge.

Front

What do ions and isotopes have in common?

Back

Both involve a change in the properties of the atom.

Front

What is the charge of a sodium ion (Na+) after it loses an electron?

Back

Positive (+) charge.

Front

What is the charge of a chloride ion (Cl-) after it gains an electron?

Back

Negative (-) charge.

Front

What is the difference between cations and anions?

Back

Cations are positively charged ions (lost electrons), while anions are negatively charged ions (gained electrons).