Question

Which isotope of oxygen has more number of protons: ${}_8{}^{16}\mathrm{O}$, ${}_8{}^{17}\mathrm{O}$, ${}_8{}^{18}\mathrm{O}$

• A. ${}_8{}^{16}\mathrm{O}$
• B. ${}_8{}^{17}\mathrm{O}$
• C. ${}_8{}^{18}\mathrm{O}$
• D. All of these

Answer 1

The correct option is D

All of these

The correct option is (D).

Explanation of correct option:

1. An atom is represented by its symbol for the element. The atomic number is written on the lower side of the symbol and the mass number is written on the upper side.
2. A positively charged particle that is found in the atoms of all elements known as a proton. The number of protons present in the nucleus or center of an atom is known as its atomic number.
3. Isotopes are the atoms of the same element which contains the same atomic number i.e., the same number of protons and electrons but they have different mass number.
4. ${}_8{}^{16}\mathrm{O}$,${}_8{}^{17}\mathrm{O}$, and ${}_8{}^{18}\mathrm{O}$ are isotopes and each has the same number of proton i.e., 8.

Thus, ${}_8{}^{16}\mathrm{O}$,${}_8{}^{17}\mathrm{O}$, and ${}_8{}^{18}\mathrm{O}$ are isotopes and each has the same number of proton i.e., 8.