Extra Practice (NOT Extra Credit)

Front

What do isotopes of an element have in common?

Back

Isotopes of an element have the same number of protons but different numbers of neutrons.

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.

Front

How do Carbon-12 and Carbon-14 differ?

Back

Carbon-12 and Carbon-14 differ in their mass number and number of neutrons.

Front

What is the charge of an atom that gains an electron?

Back

Negative (-) charge.

Front

What is the atomic mass of an element?

Back

The atomic mass is the total number of protons and neutrons in an atom.

Front

What is the number of protons in Carbon?

Back

Carbon always has 6 protons.

Front

What defines the identity of an element?

Back

The number of protons in the nucleus defines the identity of an element.

Front

What happens to the charge of an atom when it loses an electron?

Back

The atom becomes positively charged.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What is the significance of neutrons in an atom?

Back

Neutrons contribute to the mass of an atom and can affect its stability.