Solve this: bl in the blank. in
two in its down a subgrou
on the right
T he group
While the strong
Nuclear charge Of an is the
equivalent to the atomic
10. Atomic size Of neon is
I I. Atomic size a period
I i 'Wrea
and down a group the el«tronegative
reactive, while elements
— (oxidising/ reducingl agents sove they are
from left to right.
v e/ charge on nucleus an atom,
the Of fluorine.
, , with in nuclear of
12. With increase in nuclear charge the attraction for outer electrons
liner-eases/ decreasesl, hence ionisation potential
I increases/ eases).
13. Increase in nuclear charge of an atom — Idec-reases/increasesl the tendency of the atom
14. Elements with stable electronic configuration e.g. neon have an electron affinity value of — O. O, —11
15. An With a small atomic radii takes up readily than an atorn With a radii.
16. If combining atoms of a compound have nearly similar electronegativities the bond between them is
'electro t/ covalen tl
17. Elements with low electronegativity are usually
Imetallic / non-nwtallicl.
IS. An atom is said to be a non-metal if it
I gains/ loses] one or more electrons.
19. Atoms with (small/largel atomic radii & — lhigh/lowl ionisation potential tend to gain electrons.
20. Element •X' in vyriod 3 has high electronaffinity & It is likely to a —
21. Element 'B' in period 2 is to the right of element
Element "B' is likely fo be
[more/ lessl non-metallic in character than element ' A'.
22. Element 'Z' in sub-grou 2 IIA is below element 'Y' in the same sub-group. The element 'Z'
expected to have
i er lower] atomic size and [more/ lessl metallic character than •Y' -
23. Argon in period 3 is likely to have a
'larger/ smallerl atomic size than chlorine and its
electronaffinity value would be [greater/ lesser/ zero] compared to chlorine.
24. Across a period — Atomic size and metallic character
and nuclear charge
— Atomic size and metallic character
and nuclear charge
reasons for the following :
while I.P., E.X, E.N. and non-
. [increases/ decreases).
while I-P E.A., E.N. and non- metallu
. [increases/ decreases]
In the same period or subgroup a gradual change in a particular property may be seen.
Atomic size of group 18 10 group' elements is more than the atomic size of group 17 | VIIAI
Ionisation potential increases with increase in nuclear charge of the elements.
Electron affinity of noble gas elements is zero.
Phosphorus, sulphur and chlorine are electronegative elements of the periodic table:
Sulphur is placed in group 16 [VIA], chlorine in group 17 IVIIAI but argon in group 1810 gmupl of the
Fluorine is the most electronegative element of the periodic table.
Atoms with large atomic radii and low ionisation potential are more metallic in nature.
A decrease irfionisation potential of an element leads to a decææse in non-metallic chara&r of the
Atomic sizeUeCreases across a period but increases down a group of the periodic table.