CameraIcon

SearchIcon

MyQuestionIcon

1

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

Valency

The number of...

Question

The number of electrons present in the valence shell of an atom with atomic number 38 is :

A

2

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

10

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

8

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A 2
The electronic configuration of strontium ,with atomic number 38 is; $[A r] 3 d^{10} 4 s^{2} 4 p^{6} 5 s^{2}$
Therefore number of electrons in valence shell = 2.

Suggest Corrections

thumbs-up

0

Similar questions

Q. An atom of an element has

4^{t h}

shell as the valence shell with an electron pair in it. The number of electrons in

3^{r d}

shell is 2 times more than the number of electrons in

2^{n d}

shell. Identify atomic number.

Q. Atomic number of an element is 42. Find out the number of electrons present in the valence shell.

(a) What are valence electrons? Where are valence electrons situated in an atom ?

(b) What is the number of valence electrons in the atoms of an element having atomic number 13 ? Name the valence shell of this atom.

Q. The number of shells and valence electrons for an element with atomic number 14 are ___ and ___.

Q. The ratio of atomic numbers of two elements A and B is 1 : 2. The number of electrons present in the valence shell (3rd) of A is equal to the difference in the number of electrons present in the other two shells. Steps involved in the calculation of ratio of number of electrons present in a penultimate shell to antepenultimate shell of B are given below. Arrange them in the correct sequence.
(a) Calculation of atomic number of B.
(b) Calculation of valence electrons present in A.
(c) Calculation of atomic number of A.
(d) Calculation of number of electrons present in the penultimate shell and antepenultimate shell of B.
(e) Writing electronic configuration of B.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Valency - Tackle

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Standard IX Chemistry

Join BYJU'S Learning Program

CrossIcon