Atoms
An atom is the smallest unit of an ________ with the properties of that __________.
element
What is the verticle column of the periodic table of elements called?
family or group
What are the 3 states of matter
Solid, liquid, gas
A ______________ change causes a new substance to be formed
chemical
The amount of matter in an object is the
mass
What is the smallest subatomic particle
electron
What is the horizontal row of the periodic table of elements called?
period
Which phase of matter has the highest energy level
gas (or plasma)
Leaves changing colors is a _______________ change
chemical
Mass is measured with a __________ (What kind of tool is used to measure mass?)
balance
What subatomic particles are in the nucleus of the atom?
protons and neutrons
What group is the least reactive / the most stable
Noble Gases / Group 18
Moving from solids to gases, the states of matter (gain or lose) energy
gain
Boiling water is a ____________ change
physical
An object will float in water if it is less ____________ than the water.
dense
The subatomic particle with a positive charge is the
proton
What family goes with column 17?
Halogens
Water boils at what temperature in degrees Celcius?
100
Objects are cooled to __________ (increase or decrease) the rate of a chemical change
decrease
What two methods are used to measure volume
water displacement method and using a formula
The overall charge of an atom tends to be ...
neutral
What number in each square of the periodic table indicates the number of protons in the atom?
atomic number
State of matter is a ____________ property
physical
It is not possible for an object to change density unless a chemical change has occured. TRUE OR FALSE
FALSE
What is the formula to find mass?
M=DxV