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Chemistry Final Study Quiz - Gr 7 Flashcards | StudBud
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Chemistry Final Study Quiz - Gr 7
Chemistry Final Study Quiz - Gr 7
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Chemistry Final - Gr 7
Flashcards
40 cards
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Practice quiz
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Questions
40
Answers
1
A skittle has a mass of 25 g and a volume of 5 g. What is it's density?
125
5
15
2
As a liquid cools and becomes a solid, what are the particles doing?
they are moving fast and spreading away from each other
they are moving slower and closer together
3
What is kinetic energy?
energy that is in motion
energy that is very bright
energy that is loud
4
What is the atomic mass of Litium
85
3
6.941
5
Two chemicals react and produce light
chemical change
physical change
6
How many protons are found in an atom of Nitrogen?
3
7
14
7
Protons are
negatively charged
have no charge
positively charged
8
A molecule is...
two atoms near each other
two or more atoms stuck together
one atom all alone
9
An apple is cut in half
physical change
chemical change
10
Ice cube melts
chemical change
physical change
11
Food is digested
chemical change
physical change
12
Am I going to rock this test?!?
DUH
OH YEAH
I AM THE BEST
13
A bottle of two liquids mixed together explodes...
physical change
chemical change
14
According to the Kinetic Theory of Matter, all atoms in a substance are
never moving
glow in the dark
always moving
15
Physical changes can be observed with....
a stick
a looking glass
your senses
16
Which state of matter has the highest amount of kinetic energy (moving the most)
solid
gas
liquid
17
How are protons are found in a Lithium atom? (Atomic # = # of protons)
8
6.941
3
18
The atomic mass - the atomic number =
number of particles
number of neutrons
number of protons
19
The Law of Conservation of mass states that...
matter stays the same
matter can't be created or destroyed
matter can be created
20
Electrons
are positively charged
have no charge
are negatively charged
21
In a chemical change...
a new substance is formed
nothing happens
it stays the same
22
A color change is
a physical change
a chemical change
23
_______ is anything that has mass and takes up space.
matter
molecules
elements
mass
24
______ and ______ hang out at the nucleus.
electron
neutron
proton
25
In a solid, what are the particles doing?
they are just hanging out
they are tightly packed together
they are bouncing everywhere
26
The most basic unit of matter is
mixtures
compounds
atom
27
The mass of the reactants equals the mass of the products.
true
false
28
6 g of Oxygen + _____ g of Hydrogen = 14 g of Water
6
8
3
29
Pancakes are cooked
chemical change
physical change
30
Hydrogen + Oxygen --> Water. Name one of the reactants
water
oxygen
hydrogen
31
A piece of wood is chopped in half
chemical change
physical change
32
In a gas, how are the particles moving?
away from each other
stay very close together
stay a little close
33
How many neutrons are in a Nitrogen atom?
14
7
85
34
The core of an atom is the
nucleus
proton
matter
35
_________ = mass/volume
height
density
matter
36
What is the atomic number of Nitrogen?
N
14.007
7
37
Neutrons...
are negatively charged
have no chrage
are positively charged
38
10 g of Nitrogen + 20 g of Oxygen = _____ g of Nitrogen Oxide
5
30
10
39
How many neutrons are in an atom of Beryllium?
3
9
5
40
How many neutrons are in a Helium atom?
6
8
2
