24. 25 - Chapter 4 Section 1

Front

Atoms of the same element which have a different number of neutrons are called _________________

Back

isotopes

Front

When an atom has the same number of protons and electrons, the atom is __________?

Back

neutral

Front

Protons are:

Back

Positive

Front

How many protons are in a sodium atom, Na?

Back

Sodium has 11 protons.

Front

What is the atomic number of Nickel?

Back

28

Front

What are the three main subatomic particles in an atom?

Back

Protons, Neutrons, Electrons

Front

What charge do neutrons carry?

Back

Neutrons are neutral (no charge).

Front

What is the charge of an electron?

Back

Electrons are negatively charged.

Front

What determines the identity of an element?

Back

The number of protons in its nucleus.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.