Question

The correct symbol of an Cobalt is:
A.$Sd$
B.$De$
C.$Co$
D.$Pn$

Answer 1

Hint: The answer to this question is based on the basic concept of the chemistry that includes the concept of the periodic table in which the elements are arranged accordingly with the atomic numbers and each element is given by different symbols.

Complete answer:
We have studied the periodic table, its properties and also various other definitions and concepts that are related with this like the ionisation energy and its trend across the group and periods and also the electron affinity and several other parameters.
We shall now see through what is a periodic table and how are the elements arranged and also each element given a different symbol for the identification.
- The periodic table arranges the chemical elements according to their recurring properties and the number of each element corresponds to the number of their protons in the nucleus.
- Element symbols of the elements is the symbol which normally consists of one or two letters from the Latin alphabet and these are written in such a way that the first letter is capitalised.
- Now, according to the question given, cobalt is an element having the atomic number 27 which means that it has 27 protons in the nucleus and the name is derived from the German word ‘Kobolds” which means trouble maker.
Thus, the symbol for this element is $Co$

Therefore, the correct answer is option C. $Co$ .

Note:
Note that chemical symbol and element symbol are different terms where the chemical symbol denoted the chemical elements, functional groups and also the chemical compounds and element symbol is the symbol given to each element for their identification in periodic table.