The Atom 1.2/ 4.1 Chemistry

Protons are particles ________ the nucleus of an atom.

• inside

• outside

• around

• towards

Electrons are atomic particles with a ________ charge

• positive

• negative

• neutral

The following are all examples of matter

• air

• heat

• gold

• helium

• sound

The building blocks of matter are

• atoms

• compounds

• cells

_________ are particles in the atom's nucleus that have no electric charge.

• Protons

• Electrons

• Neutrons

The atomic particles outside of the atom's nucleus are ____________

• protons

• electrons

• neutrons

Substances made up of only one kind of atoms are

• isotopes

• compounds

• elements

Isotopes are atoms of the same element that have a different number of

• protons

• electrons

• neutrons

Negatively charged particles that move around the atom's nucleus are

• protons

• electrons

• neutrons

Two atoms of the same element that have a different _____________are isotopes of the element.

• atomic number

• number of electrons

• mass number