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Standard X

Chemistry

Noble Gases

In the table ...

Question

In the table below some of the element of the periodic table with atomic numbers from 3 to 18 are given. These are represented by letters which are not the usual symbols of the elements.
(A) Which of these:
(i) is a noble gas.
(ii) is a halogen.
(iii) is an alkali metal.
(iv) is an element with valency 4.
(B) If A combines with F then what would be the formula of the resulting compound?
(C) What is the electronic arrangement of G?

$\begin{matrix} 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 A & E & G 11 & 12 & 13 & 14 & 15 & 16 & 17 & 18 B & C & D & F \end{matrix}$

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Solution

(A) (i) G is a noble gas.

(ii) F is a halogen.

(iii) A and B, both are alkali metals.

(iv) D is an element with valency 4.

(B)If A combines with F then the formula of the resulting compound will be A⁺F^-.

(C)The electronic arrangement of G is 2, 8.

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Similar questions

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.

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 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 latter which represents a metal of valency 2.
(vi) Select a letter which represents a non-metal of valency 2.

Q. The number of protons, neutrons and orbital electrons in particles form letters

A

F

are given in the following table.

Particle	Protons	Neutrons	Electrons
$A$	$3$	$4$	$2$
$B$	$9$	$10$	$10$
$C$	$12$	$12$	$12$
$D$	$17$	$18$	$17$
$E$	$17$	$20$	$17$
$F$	$18$	$22$	$18$

Choose from the table the letters that represent an atom of inert gas.

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. An element with atomic number

17

is placed in the group

17

of the long from periodic table. Element with atomic number

9

is placed above and with atomic number

35

is placed below it. Element with atomic number

16

is placed left and with atomic number

18

is placed right to it. Which of the following statements are correct?

a) Valency of the element with atomic number

18

is zero.

b) Elements with same valency will have atomic number

16

17

and

18

c) Valency of element with atomic number

9

17

and

35

is one.

d) Element with atomic number

17

is more electronegative than element with atomic number

16

and

35

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Noble Gases

Standard X Chemistry

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(A) (i) G is a noble gas. (ii) F is a halogen. (iii) A and B, both are alkali metals. (iv) D is an element with valency 4. (B)If A combines with F then the formula of the resulting compound will be A+F-. (C)The electronic arrangement of G is 2, 8.

(A) (i) G is a noble gas.

(ii) F is a halogen.

(iii) A and B, both are alkali metals.

(iv) D is an element with valency 4.

(B)If A combines with F then the formula of the resulting compound will be A⁺F^-.

(C)The electronic arrangement of G is 2, 8.