6 Sci Chapter 11- Matter and Atoms

A(n) _____________________ is 2 or more atoms that are held together by chemical bonds and act as one unit.

• molecule

• element

• mixture

• solution

Nitrogen has 7 protons. An ion of nitrogen would have

• 7 electrons

• 8 electrons

• 8 neutrons

• 8 protons

A mixture in which the substances are not evenly mixed is called a

• solution

• homogeneous mixture

• compound

• heterogeneous mixture

Table salt is a _______________________.

• compound

• solution

• element

• mixture

Which of the following is a substance?

• trail mix

• granite

• soda

• gold

The type of element is determined by the number of ________________ in an atom.

• electrons

• neutrons

• protons

• protons, neutrons and electrons

The positively charged subatomic particle is called a(n)

• electron

• proton

• neutron

An ion has a charge because it has gained or lost a(n) ___________________.

• electron

• neutron

• proton

• nucleus

Which of the following is not a molecule?

• silver

• carbon dioxide

• water

• sugar

Two or more elements chemically combined is called a

• compound

• mixture

• atom

• solution