Question

Question 1
Name or state the following with reference to the elements of the modern periodic table.
[5]
a) The noble gas having an electronic configuration 2, 8, 8
b) The valency of elements in group 1 [I A]
c) The formula of the hydroxide of the element having electronic configuration
2.8.2.
d) The formula of the sulphite of the element in period -3, group 1 [IA]
e) The element, from the elements Li, Na, k having the least number of electron
shells.
Question 2
[5]
compound has a formula = "H2Y”. Y denotes a non-metals. State the following.
a) The electron present in the valence shell of Y.
b) The valency of Y.
c) The bonding present in H2Y.
39
K) and Y.
19
(40
e) The formula of the compound formed between calcium and Y.
20
d) The bonding present in the compound formed between potassium (
formed between calcium (20ca)​

Answer 1

Answer:

Q1)a) Argon

b)1

c)Mg(OH)2

d)Na2S

e)Li

Q2)a)6 electrons

b)2-

c)Covalent bond

d)Covalent bond

e)Ionic bond