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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 left outside will turn an rusty orange color
B
iron nail looks shiny and silvery
C
iron nail rubbed with a magnet attracts iron powder
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 absorbed the hydrochloric acid
B
baking soda and hydrochloric acid combined and formed bubbles
C
hydrochloric acid evaporated, leaving only the baking soda
D
baking soda dissolved in the hydrochloric acid
3) Group number determines..
A
neutrons
B
number of circles
C
valence
D
protons
4) Identity of the element determined by
A
neutrons
B
atomic number
C
electrons
D
mass number
5) Charge of the nucleus
A
negative
B
no charge
C
positive
D
negative cloud
6) atomic mass is determined by
A
protons plus neutrons
B
mass number minus protons
C
electrons minus mass number
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
7
B
2
C
9
D
17
8) Element in group 2 of the periodic table has how many valence electrons?
A
3
B
1
C
2
D
4
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
the react in similar ways
D
they have the same atomic mass
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 are stable because their valence electrons are incomplete
C
Noble gases are in the same period
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 28
B
positive 24
C
positive 28
D
negative 24
12) Which information on the periodic table gives you the number of protons of the element?
A
symbol
B
atomic mass
C
name
D
atomic number
13) Which of the following best describes an electron?
A
has no charge and less than a neutron
B
no charge and less mass than a proton
C
negative charge and little to no mass
D
negative charge and same mass as a proton
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
20
B
30
C
10
D
200
16) An atom has 10 protons and atomic mass of 20. How many neutrons?
A
200
B
30
C
20
D
10
17) An atom has 3 protons and 4 neutrons. How many electrons?
A
7
B
12
C
3
D
1
18) An atom has 3 protons and 4 neutrons. What's the mass number?
A
1
B
3
C
7
D
12
19) An atom has 5 electrons and 6 neutrons. What's the atomic number?
A
11
B
1
C
5
D
6
20) An atom has 5 electrons and 6 neutrons. What's the atomic mass?
A
1
B
5
C
11
D
6
*select an answer for all questions
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