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Physical Science 2Q 1 - 10
Test Description: Physical Science, 2nd Quarter, 1 - 10
Instructions: Answer all questions to get your test result.
1) Which of these is MOST responsible for chemical reactions?
A
Electrons in the nucleus of the atoms
B
Electrons in the highest occupied energy level of the atoms
C
Electrons closest to the nucleus of the atoms
D
Electrons traveling the fastest toward the center of the atoms
2) Electrons in the highest occupied energy level of an atom determines an elements -
A
physical structure
B
ability to make solutions
C
chemical properties
D
capacity to create mixtures
3) How many atoms are present in one molecule of NaHCO2?
A
4
B
3
C
5
D
7
4) Which compound has the following : 3 Oxygen, 1 Carbon, 2 Sodium
A
CO3N2a
B
ONa5C
C
Na2CO3
D
NaOC3
5) What is a covalent bond?
A
super molecules
B
no electron
C
a solution
D
a bond formed when atoms share electrons
6) A melting ice cube is undergoing what type of change?
A
potential change
B
chemical change
C
physical change
D
nuclear change
7) Which of the following is an example of a physical change?
A
digesting food
B
burning a match
C
breaking a wooden ruler
D
polishing silver
8) Which of the following is an example of a chemical change?
A
chocolate melting in the sun
B
burning wood
C
dissolving sugar in water
D
ripping paper
9) When cars are left in a junk yard, what was once shiny steel turns into brown, brittle rust. What type of change is this?
A
chemical change
B
mass change
C
physical change
D
nuclear change
10) When you combine vinegar and baking soda, it gives off gas. The reactants are vinegar and baking soda, what is the gas
A
suspensions
B
products
C
elements
D
reactants
*select an answer for all questions
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