Atoms, Elements, Compounds and More

What subatomic particle is found in the nucleus of an atom?

• electrons

• protons

• neutrons

• both protons and neutrons

What is the charge of an electron?

• positive

• negative

• no charge

What is the atomic number of an element?

• the number of protons

• the number of neutrons

• the number of electrons

• the number of protons and the number of electrons

What is the atomic mass of an element?

• the number of protons

• the number of electrons

• the number of neutrons + the number of electrons

• the number of neutrons + the number of protons

The periodic table is arranged by atomic number or the number of protons.

• true

• false

What is the number of electrons for phosphorus?

• 15

• 31

• 30

• 16

What is the number of neutrons for phosphorus?

• 15

• 30

• 31

• 16

Compounds are substances composed of one type of atom.

• true

• false

This substance is an example of a(n)

• element

• compound

• mixture of elements

• mixture of compounds

This substance is an example of a(n)

• element

• compound

• mixture of elements

• mixture of compounds