Test Index

WAEC Chemistry 2016 Paper

Question : 1

Total: 50

The following atoms of carbon ¹²₆C, ¹³₆C and ¹⁴₆C can be described as?

Solution:

Concept:

Isotopes are atoms of the same element having the same atomic number but different mass numbers.

Explanation:

All three atoms,

^{12}_{6}\mathrm{C}

^{13}_{6}\mathrm{C}

, and

^{14}_{6}\mathrm{C}

, have the same atomic number

Z = 6

Their mass numbers are

12

13

, and

14

respectively.

Since the number of protons is the same but the number of neutrons differs, these are isotopes of carbon.

Answer:

C. Isotopes

Go to Question:

Next Question