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Chemical Prop. Unit 1 8th grade Flashcards | StudBud
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Chemical Prop. Unit 1 8th grade
Chemical Prop. Unit 1 8th grade
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1
What subatomic particle is located outside the nucleus?
proton
protons and neutrons
electron
neutron
2
How many atoms of Hydrogen are on the product side?
2
6
5
3
3
How tightly particles are packed determines what _______ it takes.
texture
state/phase
temperature
color
4
The breaking of a glass window is a physical change.
True
False
5
Electrons = ______________.
neutrons
atomic mass
protons
protons - neutrons
6
What is it called when a liquid changes to a gas?
melting
freezing
vaporizing
condensing
7
cooling causes particles to move around ________.
more
the same
not at all
less
8
According to conservation of mass, how does the mass of the products in a chem reaction compare to the mass of reactants
there is no relationship
the mass of reactants is greater
the masses are always equal
the mass of products is sometimes greater
9
Which of the following changes is chemical rather than physical?
glass is shattered
water is boiled
wood is burned
aluminum foil is crumpled
10
When a log burns in a fire, ___________.
mass is gained
a new substance is formed
mass is lost
a physical change has occured
11
The Kinetic Theory describes the _____________ of particles in matter.
motion
phases
stillness
numbers
12
What is it called when a liquid changes to a solid?
condensing
vaporizing
melting
freezing
13
Which subatomic particle has a negative charge?
electron
proton
neutron
14
Which picture represents a gas?
3
2
1
15
What causes particles to move around more?
ice
nothing
cooler temperatures
heat
16
The large number before a molecule in a chemical equation is called the ___________.
molecules
atoms
coefficient
subscript
17
Which picture represents a liquid?
2
1
3
18
Which subatomic particle has a positive charge?
neutron
proton
electron
19
A ____________ does not change the substance into anything new.
combusiton
chemical reaction
chemical changes
physical change
20
In a chemical equation, the formulas to the right of the arrow represent the ____________.
product
solution
reactant
mixture
21
In a chemical equation, the formulas to the left of the arrow represent the ______________.
solution
mixture
reactants
products
22
neutrons= ______________.
mass plus atomic number
mass divided by atomic number
Mass minus atomic number
mass times atomic number
23
What subatomic particle is located INSIDE the nucleus?
protons and electrons
protons only
electrons only
protons and neutrons
24
Is the following equation balanced or unbalanced?
Balanced
Unbalanced
25
Which of the following is NOT a result of a chemical reaction?
the light given off by a firefly
bubbles in boiling water
a solid forming from 2 liquids reacting
copper turning green when exposed to air
26
What is it called when a solid changes to a liquid?
melting
vaporizing
condensing
freezing
27
A solid substance formed during a chemical reaction in a liquid is known as a ______________.
reactant
molecule
particle
precipitate
28
The arrow in the chemical equation represents _____________.
chemical reaction
product
reactant
physical change
29
A ____________ occurs when 2 or more molecules interact and the molecules change or rearrange.
physical property
chemical reaction
physical change
substance
30
How many TOTAL atoms are found on the product side?
28
4
21
16
31
How many TOTAL atoms are found on the reactant side?
16
28
21
4
32
Which picture represents a solid?
2
3
1
33
Protons is same as ___________.
atomic number
neutrons
atomic mass
weight
34
A subscript represents the number of ____________ in a chemical equation.
arrows
atoms
numbers
molecules
35
Which subatomic particle has no charge?
proton
electron
neutron
36
Pick out the INCORRECT statement.
The symbol for Hydrogen is H.
The symbol for sulfur is S.
The symbol for Silver is Si.
The symbol for Neon is Ne.
37
What is it called when a gas changes to a liquid?
freezing
melting
condensing
vaporizing
38
Three examples of a physical change are ____________.
a pond freezing, breaking glass, a burning candle
applying lipstick, making lemonade, baking bread
melting ice, mowing the lawn, carving statue
boiling water, nail rusting, meltin candle
39
The freezing of water is a chemical change.
False
True
