Question | Answer |
C3H8 | propane |
anything that takes up space and has mass | matter |
a very small particle that makes up most kinds of matter and consists of smaller parts called protons, neutrons, and electrons | atom |
(-)negatively charged particles | electron |
(+) positively charged particles | proton |
central part of an atom | nucleus |
the nucleus of atom "neutral" | neutron |
mass
volume | density |
states that matter is not created or destroyed but only changes its form | law of conservation of mater |
where is most of the mass of an atom located | nucleus |
what did Thomson say about the electron inside the atom? | negatively charged particles in an atom |
Who said that electrons move energy levels? | Niels Bohr |
What did Chadwick say about neutrons? | particles that come from the nucleus and have no charge (neutral) |
Cu=1 ---- 1
N = 1 x 2 = 2
O = 3 x 2 = 6
9 atoms | Cu(NO3)2 |
H=3
P=1
O=4
8 atoms | H3PO4 |
look at your pictures on your cards | Bohr Model |
Mg=1 ----- 1
C = 2 X 3 = 6
H = 3 X 3 = 9
O = 2 x 3 = 6
22 atoms | Mg (C2H3O2)3 |
practice on worksheets | balance equations |
tells which elements make up a compound as well as how many atoms of each element are present | chemical formula |
2 or more substances mixed together which don't make up a new substance | mixture |
mixture that is the same throughout | homogeneous mixture |
a metal made of 2 or more solids | alloy |
mixture that is not mixed well | heterogeneous mixture |
the part of the solution that does the dissolving | solvent |
the part of the solution that is dissolved | solute |
substance whose smallest unit is made of atoms of more than one element | compound |
matter that has same composition and properties throughout | substance |
who was the first person to coin the term atom | Democritus |
Where did Rutherford say that protons existed | in the nucleus of an atom |
law of conservation of matter | What was Lavisier's Law called |
carbon monoxide | CO |
carbon dioxide | CO |
hydrogen peroxide | H2O2 |
water | H2O |
What is the universal solvent? | water |