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Unit 2 Review #2
Test Description: This is the second set of questions.
Instructions: Answer all questions to get your test result.
1) 4. The number of protons in a neutral atom is equal to the number of
A
isotopes
B
neutrons
C
ions
D
electrons
2) One _______ and ______ are added to each element as you move across the periodic table.
A
proton and quark
B
proton and neutron
C
proton and electron
D
electron and neutron
3) How many valence electrons does bromine have?
A
6
B
5
C
7
D
1
4) Atoms of the same element with different numbers of neutrons are
A
isotopes
B
allotropes
C
metalloids
D
radioactive elements
5) The atomic number of carbon is 6. Consider an isotope of carbon whose mass number is 14.The total charge carried by the nucleus of a neutral atom of this isotope is:
A
14+
B
6-
C
0
D
6+
6) How do isotopes differ?
A
The total number of neutrons
B
The total charge outside the nucleus
C
The total number of protons and electrons
D
The total charge carried by the nucleus
7) How many protons and neutrons are there in an atom of chlorine-37?
A
17 p and 20 n
B
37 p and 37 n
C
20 p and 17 n
D
17 p and 37 n
8) The atomic number of sulfur is 16, what would the number of electrons be in a neutral atom of S?
A
32
B
6
C
16
D
15
9) Which best represents how electrons are arranged in the energy levels of an oxygen atom?
A
first energy level = 2 electron and second energy level = 6 electrons
B
first energy level = 2 electron and second energy level = 2 electrons
C
first energy level = 1 electron and second energy level = 7 electrons
D
first energy level = 3 electron and second energy level = 5 electrons
10) The number of protons and electrons in a neutral atom is also equal to the ___
A
average atomic mass
B
atomic number
C
isotope number
D
allotrope number
*select an answer for all questions
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