WorksheetsDistribution of electrons in different shells.
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
How many valence electrons does the carbon have?
a)
6
b)
4
c)
2
d)
8
2.
The outermost shell must have --------- electrons to achieve octet.
a)
5
b)
6
c)
8
d)
9
3.
Aluminum has atomic number 13. How many electrons will it have in its M shell??
(a)
4.
What will be the atomic number of sodium?
a)
11
b)
10
c)
1
d)
7
5.
(a) Has no neurtrons In its nucleus.
6.
What do you know by inert elements?
4 lines
7.
Fluorine has 9 protons in its nucleus and its mass number is 19.how many neutrons does it have?
a)
9
b)
8
c)
19
d)
10
8.
If both protons and neutrons are present in the nucleus, why is it positively charged?
4 lines
9.
Chlorine has atomic number 17.valency of chlorine is...........
a)
1
b)
7
c)
17
d)
8
10.
Number of electrons in an atom is 7.number of protons is also 7.what will be atomic number and charge on atom?
a)
7, +3
b)
7,0
c)
14,+3
d)
14,0
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