Chemical Bonds & Atoms

The center of the atom is called:

The center of an atom contains:

• electrons

• protons

• neutrons

• electron shells/ energy levels

True/ False:

The outer region of an atom is called the electron shell. It holds electrons that orbit around the nucleus.

• True

• False

Which parts of the atom have the same mass?

• electron

• proton

• neutron

• none

Vocabulary:

Subatomic particle part of the nucleus of an atom; has no charge; weighs 1 amu.

A(n) _________ in the atom has a negative charge.

Vocabulary:

Positively charged subatomic particle forming part of the nucleus of an atom; weighs 1 amu

Vocabulary:

The smallest possible amount of matter which still retains its identity as a chemical element, consisting of a nucleus surrounded by electrons.

The ___________ is the number of protons in an element and is used to distinguish one element from another

True/ False:

Atoms have different properties based on the arrangement and number of particles.

• True

• False