Chemistry
anything that has mass and occupies space
matter
pH means___
power of hydrogen
force of gas particles colliding
pressure
system that absorbs energy
endothermic reaction
how many types of chemistry?
5
neutral solutions have a pH of ___
7
more collissions=greater pressure or less pressure
greater pressure
system that releases energy
exothermic reaction
an atom is made up of 3 types of subatomic particles called____, ____, and ____
protons, neutrons, and electrons
a reaction where one element replaces another in a compound
single replacement
pressure inside=atmospheric pressure____(outside or inside)
outside
the change from liquid to gas is called____
vaporization
the center region of an atom where protons and neutrons are found
nucleus
a reaction where two compounds switch places to form two new compounds
double replacement
changes in altitude=change in ____
pressure
the phase change from gas to liquid is called____
condensation
a substance that cannot be separated into simpler substances by chemical means
element
a reaction where a substance reacts with oxygen, creating heat/light, water, and carbon dioxide
combustion
pressure due to the molecules of air in the atmosphere
atmospheric pressure
another name for heat is___
enthalpy