Isobars

Q.

Structures of nuclei of three atoms A, B and C are given below: A has 90 protons and 146 neutrons. B has 92 protons and 146 neutrons. C has 90 protons and 148 neutrons. Based on the above data, A and C are isotopes; B and C are ___.

Q.

The nucleus of tritium contains neutrons

1. 4

2. 3

3. 1

4. 2

Q.

Isotopes of the same element have

1. same mass number

2. same atomic mass

3. different mass numbers

4. different atomic numbers

Q.

State the number of atoms of each element, present in :

1. ${\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6$
2. ${\mathrm{H}}_2{\mathrm{SO}}_4$
3. ${\mathrm{HNO}}_3$
4. ${\mathrm{CaCO}}_3$

Also name these compounds.