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Atoms, Elements, Compounds And Mixtues
Test Description: Unit 3
Instructions: Answer all questions to get your test result.
1) What is the smallest unit of an element that retains the properties of that element and is the basic unit of matter?
A
electron
B
atom
C
molecule
D
neutron
2) What substance is mad of only 1 type of atom?
A
salt
B
neon
C
water
D
sugar
3) Which is a compound?
A
H2O
B
H2
C
H
D
He
4) Water is a
A
Compound
B
Element
C
Mixture
5) Carbon is a/an
A
Element
B
Mixture
C
Compound
6) Table Salt (NaCl) is a
A
Mixture
B
Element
C
Compound
7) Air is a
A
Compound
B
Mixture
C
Element
8) Trail mix is
A
Homogenous mixture
B
Compound
C
Heterogenous mixture
D
Element
9) What makes up 78% of the Earth's atmosphere?
A
Nitrogen
B
Hydrogen
C
Carbon
D
Oxygen
10) When materials combine to form a mixture, they
A
combine in a specific ration
B
always change physical state
C
keep thier orginal properties
D
react to form new substances
11) 2 or more elemens chemically combined together is a
A
Mixture
B
Element
C
Compound
*select an answer for all questions
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