Atoms And Molecules

Question 1

Which of the following has the smallest mass ?

Answer 1

1 atom of He

Question 2

Which of the following has the smallest mass ?

Answer 2

1 atom of He

Question 3

Picture of the following is a triatomic molecule ?

Answer 3

Carbon dioxide

Question 4

Which of the following represent one 1 AMU ?

Answer 4

1/12th of the mass of a C -12 atom

Question 5

In the nucleus of 20Ca⁴⁰, there are

Answer 5

20 protons and 20 neutrons

Question 6

Atoms of different elements having _____ mass number but ___ atomic number are called isobar

Answer 6

Same, different

Question 7

Atoms of different elements having same number of ____are called isotopes

Answer 7

Neutrons

Question 8

Atoms of one element can be transmuted into atoms of other element by ___

Answer 8

Artificial transmutation

Question 9

The sum of the number of proton and neutron of atom is called its _____

Answer 9

Mass number

Question 10

Relative atomic mass is otherwise known as

Answer 10

Standard atomic weight

Question 11

If a molecule is made of similar kind of atom, then it is called _____atomic

Answer 11

Homo

Question 12

The number of an atom present in a molecule is called its

Answer 12

Atomicity

Question 13

Atomicity of phosphorus is

Answer 13

4