the temperature at which something boils
One chemical property of a substance is its _______, or whether or not it can catch fire.
What is needed in order to change the state of matter?
Sulfuric acid and nitric acid are both commonly used acids.
Elements in the far-left columns of the periodic table are alkali metals.
a resistance to sinking
When it rains, _____ happens as gas changes to liquid and falls to the ground.
a way a substance reacts with another substance
decrease in volume due to change in heat
smallest unit of an element
process that changes a gas into a liquid
Oxygen molecules are usually found as a gas, but at very low temperatures, they can become a(n) _____.
Mass is measured in pounds.
Electrons are much smaller than protons and neutrons. They have about _____ times less mass.
a smaller particle with one unit of negative electric charge
the process of a liquid changing into a gas
a particle with one unit of positive charge
a particle with no electrical charge
Molecules are particles that have more than _____ atoms joined together.
Most bridges and buildings have _____ joints to allow the objectís volume to change with heat.
amount of matter in an object
this measures how much space matter takes up
An atom is the _____ unit of an element.
Materials such as glass, rubber, and plastic are all called _____.
The oxygen that we breathe is a molecule made of two oxygen atoms.