How can we help?

You can also find more resources in our Help Center.

Chapter 9

Chapter 9
STUDY
PLAY
mass
A measure of the amount of matter in an object.
weight
A measure of how gravity pulls on an object.
metal
Any of a group of elements that conducts heat and electricity, has a shiny luster, and is flexible.
nucleus
The center of an atom that has most of its mass.
proton
A particle in the nucleus of an atom that carries one unit of positive electric charge.
neutron
A particle in the nucleus of an atom that has no electric charge.
electron
A particle in the space outside the nucleus of an atom that carries one unit of negative electric charge.
molecule
A particle that contains more than one atom joined together.
ductility
The ability to be pulled into thin wires without breaking.
corrosion
The gradual wearing away of a metal by combining with nonmetals in its environment.
volume
A measure of how much space the matter of an object takes up.
semiconductor
A material that has properties in between conductors and insulators.