Chapter 19, Problem 1STP

Interpretation Introduction

Interpretation :

The name for the atoms having same atomic numbers but different mass numbers needs to be determined.

Concept Introduction :

The atomic number is the total number of protons pr electrons present in an atom while the mass number is the sum of the number of protons and neutrons present inside the nucleus of an atom.

Answer to Problem 1STP

Option C

Explanation of Solution

Reason for correct option:

The Isotope of an element is those variants which represent the same atomic number but the different mass number of an element.

Conclusion

Reasons for incorrect options:

A. Neutrons- Neutrons are the subatomic particles of the atoms which are present inside the nucleus.

B. Nucleons- Nucleons means a proton or neutron which is subatomic particles of the atom.

D. Alpha particles- Alpha particles are the radioactive particles consisting of the two protons and two neutrons that are bound tightly together inside a nucleus.