Question

mmonly used hig
Mass number (A)
rolons in the nucleus of
of protons and neutro
4. Electronic configuration of an atom X is (2, 8, 7). It combines with another atom Y having
electronic configuration (1):
(i) What type of bond will be formed between X and Y?
(ii) Write the formula of the compound formed.
(iii) Is it soluble in water ?
56
108
127
197
208
232*
B. Tick (~) the correct choice.
1. An atom consists of an equal number of
(a) neutrons and protons
(6) protons and electrons
(c) neutrons and electrons
(d) protons and positrons
2. Which of the following is correct electronic configuration of sodium ?
(a) 2,8
(6) 8,2,1
(c) 8,2
(d) 2,8,1
3. The bond formed due to mutual sharing of electrons is
(a) ionic bond
(6) covalent bond
(c) coordinate bond
(d) polar bond
4. Which of the Nat and He has completely, filled K and L shells ?
(a) both of the Nat and He
(6) He
(c) Na
(d) none of these
different mass numbe
units is called its atom
5. The nucleus of hydrogen atom is called ?
(a) neutron
(c) proton
(b) positron
(d) electron
ONE WORD ANSW
me held together ? C. Fill in the Blanks Type Questions
chell of an atom ?
1.
are positively charged particles having mass equal to that of a hydrogen atom.
2. The K-shell of an atom cannot have more than
electrons.​

Answer 1

Answer:

mmonly used hig

Mass number (A)

rolons in the nucleus of

of protons and neutro

4. Electronic configuration of an atom X is (2, 8, 7). It combines with another atom Y having

electronic configuration (1):

(i) What type of bond will be formed between X and Y?

(ii) Write the formula of the compound formed.

(iii) Is it soluble in water ?

56

108

127

197

208

232*

B. Tick (~) the correct choice.

1. An atom consists of an equal number of

(a) neutrons and protons

(6) protons and electrons

(c) neutrons and electrons

(d) protons and positrons

2. Which of the following is correct electronic configuration of sodium ?

(a) 2,8

(6) 8,2,1

(c) 8,2

(d) 2,8,1

3. The bond formed due to mutual sharing of electrons is

(a) ionic bond

(6) covalent bond

(c) coordinate bond

(d) polar bond

4. Which of the Nat and He has completely, filled K and L shells ?

(a) both of the Nat and He

(6) He

(c) Na

(d) none of these

different mass numbe

units is called its atom

5. The nucleus of hydrogen atom is called ?

(a) neutron

(c) proton

(b) positron

(d) electron

ONE WORD ANSW

me held together ? C. Fill in the Blanks Type Questions

chell of an atom ?

1.

are positively charged particles having mass equal to that of a hydrogen atom.

2. The K-shell of an atom cannot have more than

electrons.