(a) Among Period 2 elements A, B, C and D, the one which has high electron affinity is - Noon Academy

(a) Among Period 2 elements A, B, C and D, the one which has high electron affinity is

Chemistry | Class 10 | ICSE | Periodic Table, Periodic Properties and Variations of Properties | Selina

(a) Among Period 2 elements A, B, C and D, the one which has high electron affinity is

A. Lithium B. Carbon

C. Fluorine D. Neon

(b) Group No. ’s

IA	IIA	IIIA	IVA	VA	VIA	VIIA	0
1	2	13	14	15	16	17	18
Li		D			O	J	Ne
A	Mg	E	Si		H	K
B	C		F	G			L

Select from the table:

(i) Which is the most electronegative?

(ii) How many valence electrons are present in G?

(iii) Write the formula of the compound between B and H.

(iv) In the compound between F and J, what type of bond will be formed?

(v) Draw the electron dot structure for the compound formed between C and K.

Answers:

(a) Correct Answer: A. Lithium

When we go from left to right in a period, the electron affinity decreases.

(b)

(i) The element J is the most electronegative.

(ii) 5 is the number of valence electron present in the element G.

(iii) The formula of the compound between B and H is B₂H.

(iv) Covalent bond is formed between F and J.

(v)

i

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