Consider the section of the Periodic Table given below:

Note: In this table:

B does not represent boron. C does not represent carbon. F does not represent fluorine. H does not represent hydrogen. K does not represent potassium.

You must see the position of the element in the Periodic Table.

Some elements are given in their own symbol and position in the Periodic Table while others are shown with a letter. With reference to the table:

Write the formula of the compound between B and H.

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BH₂

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B₂H

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B₂H₂

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Solution

The correct option is C
B₂H

B has 1 valence electron, so its valence is 1 and it can be represented as B⁺.

H has 6 valence electrons so its valence is -2 and it can be represented as H^2- .

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Similar questions

Consider the section of the Periodic Table given below:

Note: In this table:

B does not represent boron. C does not represent carbon. F does not represent fluorine. H does not represent hydrogen. K does not represent potassium.

You must see the position of the element in the Periodic Table.

Some elements are given in their own symbol and position in the Periodic Table while others are shown with a letter. With reference to the table:

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

Q. Consider the section of the periodic table given below:

Group number	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

Note: In this table B does not represent boron
C does not represent carbon
F does not represent fluorine
H does not represent hydrogen
K does not represent potassium
You must see the position of the element in the periodic table.
Some elements are given in their own symbol and position in the periodic table, while others are shown with a letter. With reference to the table answer the following:
(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.

The following diagram shows a part of the periodic table containing first three periods in which five elements have been represented by the letters a, b, c, d and e (which are not their chemical symbols) :

(i) Select the letter which represents an alkali metal.

(ii) Select the letter which represents a noble gas.

(iii) Select the letter which represents a halogen.

(iv) What type of bond is formed between a and e?

(v) What type of bond is formed between d and e?

Q. The following diagram shows a part of the periodic table containing first three periods in which five elements have been represented by the letters a, b, c, d and e (which are not their chemical symbols):

a	2	13	14	15	16	17
		b					c
d						e

(i) Select the letter which represents an alkali metal.
(ii) Select the letter which represents a nobles gas.
(iii) Select the letter which represents a halogen.
(iv) What type of bond is formed between a and e?
(v) What type of bond is formed between d and e?

Q. The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here are not the chemical symbols of the elements):

a 3	b 4		c 5	d 6	e 7	f 8	g 9	h 10
i 11	j 12		k 13	l 14	m 15	n 16	o 17	p 18

(i) Which element has a bigger atom, a or f?
(ii) Which element has a higher valency, k or o?
(iii) Which element is more metallic, i or k?
(iv) Which element is more non-metallic, d or g?
(v) Select a letter which represents a non-metal of valency 2.
(vi) Select a letter which represents a noble gas.

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The correct option is C B2H B has 1 valence electron, so its valence is 1 and it can be represented as B+. H has 6 valence electrons so its valence is -2 and it can be represented as H2- .

The correct option is C
B₂H

B has 1 valence electron, so its valence is 1 and it can be represented as B⁺.

H has 6 valence electrons so its valence is -2 and it can be represented as H^2- .