Question

e) Ammonia and hydrogen chloride gases are mixed
The following table shown the position of noven elements AB,C,D,E,F and in
the modern periodie table with atomio no. from 3 to 18.
10
8
1
6
7
8
11
12
13
14
15
16
18
B В
D
b)
Which of these elements is a noble gas?
If A combined with F, what would be the formula of resulting compound?
What is the electronic arrangement of element G?

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Answer 1

Answer:

a) E

b) D

c) B

d) The noble gases

e) D has bigger atomic radius.The atomic radius decreases in moving from left to right along a period.This is due to an increase in nuclear charge which tends to pull the electrons closer to the nucleus and reduces the size of the atom.