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WorksheetsElectronic Configuration 1
Total questions: 10
Worksheet time: 11mins
Name
Class
Date
1.
Chemists can identify the composition of some unknown salts by conducting a flame test. When potassium salts are heated in a flame, a purple color is observed.
This is due to the movement of electrons between energy levels. What is the electron configuration of a potassium atom at ground state?
a)
1s2; 2s2; 2p6; 3s2; 3p6; 4d1
b)
1s2; 2s2; 2p6; 3s2;3p6; 3d1
c)
1s2; 2s2; 2d6; 3s2; 3d6; 4s1
d)
1s2; 2s2; 2p6; 3s2; 3p6; 4s1
2.
The electron configuration of an atom is 1s22s22p6. The number of electrons in the atom is
a)
3
b)
6
c)
8
d)
10
3.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
4.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
5.
An orbital can at most hold how many electrons?
a)
1 electron
b)
2 electrons
c)
3 electrons
d)
4 electrons
6.
The electron configuration of an atom is 1s22s22p6. The number of valence electrons in the atom is
a)
3
b)
6
c)
8
d)
10
7.
What is the electron configuration for this atom?
a)
1s22s22p6
b)
1s22s22p5
c)
1s22s22p3
d)
2s22p3
8.
Which element has 2,8,8 electrons per shell?
a)
Lead
b)
Fluorine
c)
Neon
d)
Argon
9.
How many electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
4
10.
How many valence electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
4
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