Page 2 - 4. Home Assignment Ch-5 TREND IN THE PROPERTIES

Q.4 Assertion: Be and Al show some similar properties.
Reason: The metallic radius of Be is less than the metallic radius of Al.

Q.5
Assertion: The atomic and ionic radii generally decreases towards right in a
period.
Reason: The ionisation enthalpy increases on moving towards left in a period.

Home assignment

S.L Questions Ma Skill
No. rk
Q.1 1 R
Out of Li and K, which will have stronger metallic character and
why? [CBSE 2016]
Q.2 1 u
Arrange the following metals in decreasing order of their atomic
size: [CBSE2011]
Mg, B, Be, Ca.
Q.3 (a) How does electro positivity of elements vary as we move: 3 R+
(i) Down a group A
(ii) Across a period
(b) Which atomic property increases both as we move across a period or
down a group.
Q.4 From the part of a periodic table, answer the following questions: 3 U+
A
1 2 13 14 15 16 17
Lithium Carbon Oxygen Fluorine
X P Q
Y R

Z T

(a) Which is the most reactive metal?
(b) Name the family of fluorine Q, R, T.
(c) Name one element each of group 2 and 15.
(d) Give the name of the element P placed below Carbon.
(e) Compare X and P with respect to size of atoms.
Q.5 Consider the following elements: 5 HO
Ca20, Ar18, O8, S16, Be4, H1 T
a) Which of the following element would you expect to be:
1) Very stable
2) In group 2
3) In group 16
B) An element X is in group 2 of the periodic table
i) What will be the formulae of its chloride?
ii)What will be the formulae of its oxide?

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