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Chem Sem 1 Test

Enter the letter for the matching Answer
incorrect
1.
(H2PO4)-
incorrect
2.
group 17
incorrect
3.
compound
incorrect
4.
endothermic reaction
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5.
core electrons
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6.
(NO3)-
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7.
period
incorrect
8.
Thompson
incorrect
9.
km
incorrect
10.
ROUND TO THREE SIG FIGS:6.999
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11.
law of conservation of matter
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12.
(CN)-
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13.
double-replacement
incorrect
14.
61.2+9.35+8.6=(find answer with correct significant figures)
incorrect
15.
(ClO3)-
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16.
insoluble
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17.
(O2)2-
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18.
metalloids
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19.
(ClO4)-
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20.
chadwick
A.
2 elements that replace each other in the equation
B.
the combined electrons minus the outermost ring
C.
properties of nonmetals and metals
D.
chlorate
E.
cyanide
F.
matter cannot be created or destroyed
G.
S, CO3, PO4, (all OH except with(group 1, and Ca and down in group 2))
H.
perchlorate
I.
1932-found out that the protons and electrons aren't adding up to the elements mass. he noticed that there must be neutrons in the nucleus with the protons and the electron clouds around it. present day model.
J.
1895-Thompson, plum pudding model. filled container with gas and attached a battery charge to both ends and can glowed, added a wall with a small opening on one side of the can and a line/strip of green went from one end to the other.
K.
79.2
L.
peroxide
M.
dihydrogen phosphate
N.
7.oo
O.
halogens
P.
nitrate
Q.
horizontal row of electrons
R.
energy is taken in
S.
2 or more combined elements
T.
kilometer
Type the Answer that corresponds to the displayed Question.
incorrect
21.
(CrO4)2-
incorrect
22.
equation to find the heat of an object
incorrect
23.
convert moles to molecules
incorrect
24.
convert grams to moles
Type the Question that corresponds to the displayed Answer.
incorrect
25.
shoes all the atoms in a formula
incorrect
26.
reactants combine
incorrect
27.
calories * 4.184
incorrect
28.
amount of energy it takes to raise the temperature of 1 gram 1 degree Celsius
incorrect
29.
vertical rows on the periodic table
incorrect
30.
the whole numbers in a balanced equations

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