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STARR Review Questions V
Test Description: Practice for exam
Instructions: Answer all questions to get your test result.
1) Which of the following best describes a change in iron caused by a chemical reaction?
A
iron nail rubbed with a magnet attracts iron powder
B
iron nail looks shiny and silvery
C
iron left outside will turn an rusty orange color
D
iron wire attached to a battery becomes hot
2) Madeline spilled hydrochloric acid on the lab table. She sprinles baking soda on the spill to help clean up the spill. Which evidence of a chemical change did she observe?
A
baking soda dissolved in the hydrochloric acid
B
baking soda and hydrochloric acid combined and formed bubbles
C
baking soda absorbed the hydrochloric acid
D
hydrochloric acid evaporated, leaving only the baking soda
3) Group number determines..
A
valence
B
neutrons
C
protons
D
number of circles
4) Identity of the element determined by
A
mass number
B
neutrons
C
atomic number
D
electrons
5) Charge of the nucleus
A
negative
B
no charge
C
negative cloud
D
positive
6) atomic mass is determined by
A
electrons minus mass number
B
protons plus neutrons
C
mass number minus protons
D
protons plus electrons
7) Flourine is in group 17 and has an atomic number of 9. How may valence electrons does it have?
A
2
B
9
C
7
D
17
8) Element in group 2 of the periodic table has how many valence electrons?
A
3
B
4
C
2
D
1
9) Flourine, Chlorine, Bromine and Iodine are all found in the same group. These elements are group together because
A
they are noble gases
B
the are metals
C
they have the same atomic mass
D
the react in similar ways
10) Which explains why Noble gases do not react with other elements?
A
noble gases are stable because their valence shells are complete
B
noble gases physical properties are different than other elements
C
noble gases are stable because their valence electrons are incomplete
D
Noble gases are in the same period
11) An atom has 24 protons, 28 neutrons and 24 electrons. What's the charge of the nucleus?
A
positive 28
B
negative 24
C
negative 28
D
positive 24
12) Which information on the periodic table gives you the number of protons of the element?
A
atomic number
B
name
C
atomic mass
D
symbol
13) Which of the following best describes an electron?
A
negative charge and little to no mass
B
no charge and less mass than a proton
C
negative charge and same mass as a proton
D
has no charge and less than a neutron
14) Which group of elements are most reactive?
A
elements with 6 valence
B
elements with 1 valence
C
elements with 8 valence
D
elements with 3 valence
15) An atom has 10 protons and atomic mass of 20. How many electrons
A
200
B
30
C
20
D
10
16) An atom has 10 protons and atomic mass of 20. How many neutrons?
A
10
B
30
C
20
D
200
17) An atom has 3 protons and 4 neutrons. How many electrons?
A
12
B
7
C
3
D
1
18) An atom has 3 protons and 4 neutrons. What's the mass number?
A
7
B
1
C
12
D
3
19) An atom has 5 electrons and 6 neutrons. What's the atomic number?
A
6
B
1
C
11
D
5
20) An atom has 5 electrons and 6 neutrons. What's the atomic mass?
A
5
B
11
C
6
D
1
*select an answer for all questions
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