Question

Which among the following is not correctly matched?

• A. Copper - $\mathrm{Co}$
• B. Cobalt - $\mathrm{Co}$
• C. Calcium - $\mathrm{Ca}$
• D. Silver - $\mathrm{Ag}$

Answer 1

The correct option is A

Copper - $\mathrm{Co}$

In the periodic table, each and every element is denoted by symbols.

The symbol for

1. copper - $\mathrm{Cu}$,
2. cobalt - $\mathrm{Co}$,
3. Calcium - $\mathrm{Ca}$
4. Silver - $\mathrm{Ag}$.

The option that is incorrectly matched is 'Copper - $\mathrm{Co}$'. Hence, the correct answer is Option A.