MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Variation of Valency

Five elements...

Question

Five elements A, B, C, D and E have atomic numbers of 2, 3, 7, 10 and 18 respectively. The elements which belong to the same period of the periodic table are :

(a) A, B, C (b) B,C,D (c) A, D, E (d) B, D, E

Open in App

Solution

(b) B, C, D:
B, C and D, with atomic numbers 3,7 and 10 respectively, belong to the same period of the periodic table. This is because the elements B, C and D have the same valence shell (L shell).

Suggest Corrections

thumbs-up

2

Similar questions

Q. Question 6
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?

(a) A, B, C
(b) B, C, D
(c) A, D, E
d) B, D, E

Q. The elements A, B, C, D and E have atomic numbers 9, 11, 17, 12 and 13 respectively. The pair of elements which belongs to the same group of the periodic table is:

(a) A and B
(b) B and D
(c) A and C
(d) D and E

Q. Which of the given elements A, B, C, D and E with atomic number

2, 3, 7, 10

30

respectively belong to the same period?

Q. Which of the given elements belong to the same period?

(i) A (Z = 2) (ii) B (Z = 3) (iii) C (Z = 6) (iv) D (Z = 10) (v) E (Z = 30).

Z is used to denote atomic number.

Q. Question 7
The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group?

(a) A and B
(b) B and D
(c) A and C
(d) D and E

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Contraceptive Methods

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Variation of Valency

Standard X Chemistry

Join BYJU'S Learning Program

CrossIcon