Which of the following best describes an atom?
tiny substance that cannot move but is locked in place to give all matter its shape
a type of particle that makes up all matter and that can combine with other particle
a negatively-charged body of matter that is responsible for electrical current
Which subatomic particle has the LEAST mass?
proton
neutron
electron
Elements are composed of atoms of at least two different types.
True
False
The noble gases are an example of a ______ of elements.
period
family
table