Parts of an atom
Periodic Table of Elements
Counting atoms in a chemical equation
COUNT THE ATOMS
COUNT THE ATOMS
states of matter
mixtures,
pure substances,
and compounds
pure substances,
and compounds
chemical and physical
properties / changes
properties / changes
Random Questions
100
The center of an atom is called ______________
The nucleus
100
the atomic number tells you the number of ___________
protons
100
H2O
3
100
what state of matter is this?
Solid
100
Define pure substance
all the atoms or molecules are the same throughout.
100
color
physical property
100
List 2 lab rules
no closed-toed shoes
no loose clothing
lab materials may not leave the classroom
do not put chemicals back in the conttainer
follow teacher's directions
no horseplaying
200
what are the charges of the 3 different subatomic particles
proton - Positive
Electron - Negative
Neutron - Neutral
200
to get the number of neutrons you subtract
____________ - ______________
mass - the atomic number.
200
5NaCl
10
200
what state of matter is this
gas
200
is this a mixture, pure substance?
mixture.
200
taste
physical property
200
What is a hypothesis
an educated guess
300
What subatomic particle determines what element an atom is?
A proton.
300
The largest group of elements is
Metals.
300
NaHCO3
6
300
what state of matter has the least amount of energy
solid
300
is this an element or a compound
NaCl
Compound
300
flammability
chemical property
300
small numbers in a chemical formula
( the 2)
subscript
400
What do you add together to get the mass of an atom?
Protons and Neutrons
400
This group of elements is very poor conductors of electricity and heat.
Nonmetals.
400
C8H8O3
19
400
very high pressure can cause a liquid to turn to a ______________
solid
400
a mixture or pure substance
pure substance
400
heat is released
chemical change
400
the shortest month of the year
February
500
an atom is mostly made up of?
empty space.
500
this group of elements is ductile
Metals.
500
CaMg(CO3)2
10
500
when a substance turns straight from a solid to a gas
sublimation
500
element or compound
Mg
element
500
what type of change is this
physical change
500
how many stripes are there on the American flag
13
600
what is the name of the units we use to measure the mass of subatomic particles?
you must tell me the name, not just the letters.
Atomic
Mass
Unit
600
Sodium is a _________________
Metal, Metaloid, or Nonmetal
Metal
600
Al2(SO4)3
18
600
when a substance goes straight from a gas to a solid
Deposition.
600
which one is a mixture
A
600
ice melting
physical change
600
a chemical reaction that absorbs heat
endothermic
700
the electrons are located in the _____________
Electron Cloud
or
Electron shield
700
a small group of elements that is nonreactive.
Noble Gasses
700
C16 H18 Cl (N3 S)5
51
700
the point where a substance could be any 3 of the states of matter
Tripple point
700
which one is a compound 
B
700
baking cookies
chemical
700
An element that explodes when it comes in contact with water.
Sodium, Na