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Ch 2 Elements of Chemistry Flashcards | StudBud
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Ch 2 Elements of Chemistry
Ch 2 Elements of Chemistry
15 terms
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StudBud Administration
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146 plays
to introduce Chemistry
Flashcards
15 cards
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Questions
15
Answers
1
A phase change
is both physical and chemical
is a physical change
is neither physical or chemical
is a chemical change
2
Which of the following is NOT a physical property
density
color
reactivity
odor
3
The ________ of a substance is defined as its mass divided by its volume.
density
ratio
thermal energy
reactivity
4
Mayonnaise is one type of mixture called a ...
homogenous mixture
compound
solution
colloid
5
A chemical reaction can be signified by
it's odor
production of light
it's color
it's density
6
What's the difference between a compound and an element?
elements never form molecules
element has only 1 atom
Compound has only 1 type of atom
Compounds have 1 atom of at least 2 or more elements.
7
Solutions are examples of
homogenous mixtures
elements
compounds
heterogeneous mixtures
8
Aluminum, oxygen and sulfur are examples of ...
elements
compounds
homogenous mixtures
subatomic particles
9
A solution in which water is the solvent is called...
aqueous
colloidal
solute
Kool-Aid
10
What is the difference between a compound and a mixture?
mixtures have fixed compostions
compounds and mixtures have atoms of only 1 type of atom
compounds have a variable composition
compounds have fixed compositions
11
How many atoms are in each molecule of H
2
SO
4
3
7
5
6
12
What is the best way to separate a mixture of sand and salt?
distillation
dissolving
condensation
using solubility to separate the mixture
13
An example of a mixture is
silver chloride
air
CuCl2
hydrogen
14
H
2
O is a
compound
mixture
atom
element
15
Which of these is a actinide metal?
carbon
iron
thorium
helium
