Question

20. Fill in the blanks from choices given in the brackets.
(a) Across a period, the ionisation potential
(increases/decreases/remains the same).
(b) Down the group, the electron affinity
(increases/decreases/remains the same). (2011)
21. Give the number of group and period of the element
having three shells and three electrons in the valence
sheli.
[2011]
Ionisation potential of an element increases across a
period. Explain the statement.
[2012]
(c) M is a metal ab
and its oxide !
when dissolved
hydroxide whic
In the above ce
(1) What kin
and O?
(ii) How mar
shell of
(ii) Name the
(iv) State the
(v) Namet
25. (a) Arrange the
in the brad
(i) Cs, N
charac
(i) Mg,
size)
(iii) Na,
ener
(iv) C1,
Group
number
2nd
period
IA IIA IIIA IVA
VIA VIIA 0
12 13 | 14 15 16 17 18
0 Ne
A | Mg El si
Hм |
IR TT Tou Y
[Note: In this table, H does not represent hydrogen. Some
Tomate are aimen in their om sumhol and nosition in the
​

Answer 1

Answer:

Explanation:1 : increases

2: decreases