Question

fill in the blank
use the vocabulary words from the vocabulary matching section to fill in the missing information in the passage below
matter is anything that has mass and takes up space. the primary constituent of matter is called an
and is made up of
. each atom is made of smaller particles, known as subatomic particles. in the
, or middle, of an atom are two types of subatomic particles:
and
. the positively charged particles in the nucleus of an atom are called
while the uncharged particles in the nucleus are called
. orbiting the nucleus of an atom is a cloud of negatively charged
. these negatively charged particles are much smaller in mass than protons and neutrons, so much so that they do not contribute a significant amount to the mass of an atom. therefore, to calculate the
of an atom, you find the sum of the protons and neutrons found in the atom.

Explanation:

Matter is composed of atoms which have sub - atomic particles. Protons and neutrons are in the nucleus, electrons orbit the nucleus, and atomic mass is based on protons and neutrons.

Answer:

1. atom
2. subatomic particles
3. nucleus
4. protons
5. neutrons
6. protons
7. neutrons
8. electrons
9. atomic mass