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Atomic Structure
Test Description: Chemistry ACE
Instructions: Answer all questions to get your test result.
1) What is the relative mass for electron?
A
1/1000
B
1/2000
C
1
D
1000
2) Proton number also known as
A
mass number
B
atomic number
3) Copper has a mass number of 64, atomic number of 29. How many electron does Copper has?
A
27
B
29
C
64
D
28
4) Isotopes are atoms of the same element with the same numbers of ______ but different number of _______.
A
neutrons, electrons
B
protons, neutrons
C
protons, electrons
D
neutrons, protons
5) Chlorine has 2 isotopes, Chlorine-35 and Chlorine-37. The relative atomic mass of Chlorine is given to be 35.5. Calculate the relative abundance of Chlorine-37.
A
25
B
26
C
27
6) Isotopes will have same _______ properties but different ________ properties.
A
chemical physical
B
physical chemical
7) What are the names of 4 sub shells?
A
x y z f
B
h m j k
C
a b c d
D
s p d f
8) How many electrons can principal quantum shell, 2p contain?
A
5
B
4
C
7
D
6
9) As the principal quantum number, n. increases, the energy gap between successive shells gets _____
A
smaller
B
bigger
10) Atoms with the same number of valence electrons will have the same _______ properties.
A
chemical
B
physical
C
biological
*select an answer for all questions
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