CameraIcon

SearchIcon

MyQuestionIcon

1

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

Features of Group and Periods

Write the ato...

Question

Write the atomic number and electronic configuration of the following elements.

(i) Sodium

(ii) Chlorine

(iii) Neon

(iv) Magnesium

Open in App

Solution

(i) Sodium
Atomic number = 11
Electronic configuration = 2,8,1

(ii) Chlorine
Atomic number = 17
Electronic configuration = 2,8,7

(iii) Aluminium
Atomic number = 13
Electronic configuration = 2,8,3

(iv) Silicon
Atomic number = 14
Electronic configuration = 2,8,4

Suggest Corrections

thumbs-up

41

Similar questions

State the number of electrons present in the outermost shell of the atoms of the following elements.
(i) Neon
(ii) Chlorine

Q. (a) Write down the electronic configuration of (i) magnesium atom, and (ii) magnesium ion.
(At. No. of Mg = 12)
(b) Write down the electronic configuration of (i) sulphur atom, and (ii) sulphide ion.
(At. No. of S = 16)

Q. (a) Write down the electronic configuration of (i) sodium atom, and (ii) chlorine atom.
(b) How many electrons are there in the outermost shell of (i) a sodium atom, and (ii) a chlorine atom?
(c) Show the formation of NaCl from sodium and chlorine atoms by the transfer of electron(s).
(d) Why has sodium chloride a high melting point?
(e) Name the anode and the cathode used in the electrolytic refining of impure copper metal.

Arrange the elements with the following electronic configurations in the increasing order of electron affinity

(i) $1 s^{2} 2 s^{2} 2 p^{3}$ (ii) $1 s^{2} 2 s^{2} 2 p^{4}$ (iii) $1 s^{2} 2 s^{2} 2 p^{5}$ (iv) $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{4}$

Q. Ramu has an element

X

with an Atomic Number of 13, while Somu has an element

Y

with an Atomic Number of 16. If Ramu and Somu mix those elements and heat it, a new compound of

Z

is formed.
Keeping this mind and answer the following question.
i) Write the electronic configuration of

X

.
ii) Write the electronic configuration of

Y

.
iii) Which one is a metal and which is a non-metal?
iv) What is the valency of

X

?
v) What is the valency of

Y

?
vi) Write the formula of

Z

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Classification of Periodic Table

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Features of Group and Periods

Standard X Chemistry

Join BYJU'S Learning Program

CrossIcon