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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 wire attached to a battery becomes hot
C
iron nail looks shiny and silvery
D
iron left outside will turn an rusty orange color
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
hydrochloric acid evaporated, leaving only the baking soda
B
baking soda dissolved in the hydrochloric acid
C
baking soda and hydrochloric acid combined and formed bubbles
D
baking soda absorbed the hydrochloric acid
3) Group number determines..
A
neutrons
B
valence
C
protons
D
number of circles
4) Identity of the element determined by
A
mass number
B
electrons
C
neutrons
D
atomic number
5) Charge of the nucleus
A
negative
B
positive
C
negative cloud
D
no charge
6) atomic mass is determined by
A
mass number minus protons
B
protons plus electrons
C
protons plus neutrons
D
electrons minus mass number
7) Flourine is in group 17 and has an atomic number of 9. How may valence electrons does it have?
A
9
B
7
C
2
D
17
8) Element in group 2 of the periodic table has how many valence electrons?
A
4
B
1
C
3
D
2
9) Flourine, Chlorine, Bromine and Iodine are all found in the same group. These elements are group together because
A
the are metals
B
they are noble gases
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 in the same period
B
noble gases are stable because their valence shells are complete
C
noble gases are stable because their valence electrons are incomplete
D
noble gases physical properties are different than other elements
11) An atom has 24 protons, 28 neutrons and 24 electrons. What's the charge of the nucleus?
A
negative 24
B
positive 28
C
positive 24
D
negative 28
12) Which information on the periodic table gives you the number of protons of the element?
A
name
B
symbol
C
atomic mass
D
atomic number
13) Which of the following best describes an electron?
A
no charge and less mass than a proton
B
negative charge and little to no mass
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 8 valence
B
elements with 3 valence
C
elements with 1 valence
D
elements with 6 valence
15) An atom has 10 protons and atomic mass of 20. How many electrons
A
10
B
20
C
30
D
200
16) An atom has 10 protons and atomic mass of 20. How many neutrons?
A
200
B
10
C
30
D
20
17) An atom has 3 protons and 4 neutrons. How many electrons?
A
7
B
3
C
12
D
1
18) An atom has 3 protons and 4 neutrons. What's the mass number?
A
1
B
7
C
12
D
3
19) An atom has 5 electrons and 6 neutrons. What's the atomic number?
A
5
B
6
C
11
D
1
20) An atom has 5 electrons and 6 neutrons. What's the atomic mass?
A
5
B
1
C
6
D
11
*select an answer for all questions
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