Question

OSWAAL CBSE Sample Question Papers, SCIENCE
5
Z
(a) Name the element having smallest atomic size.
(b) Write electronic configuration of element E.
(c) Identify the elements which have similar physical and chemical properties as the elen
(d) The number of groups the modern periodic table has
(i) Seven
(ii) Eight
(iii) Seventeen
(iv) Eighteen
5. Which of the following are exothermic processes ?
(i) Reaction of water with quick lime.
(ii) Dilution of an acid.
74'
ton
t on
$\beta \sec( \cos( \cot( \cot( \cot( \cot( \cot( \cot(ee) ) ) ) ) ) ) ) jashsj$
​

Answer 1

Answer:(a) Helium

(d) eighteen

(e) both are exothermic

Explanation:please tell what is elements E

Answer 2

Answer:

a--hydrogen

c- ithium and calcium

d - eighteen

5. reaction of water with quicklime

Explanation: