Question

To which group, an element with atomic number 88 will belong?
A. Group 12
B. Group 17
C. Group 10
D. Group 2

Answer 1

The atomic number also known as proton number represented by the symbol Z. It generally tells us about the number of protons present in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element.

Complete Solution :
- In chemistry a group also known as a family which is defined as a column of elements in the periodic table of the chemical elements. There are 18 groups present in the periodic table and the elements in a group have similar physical or chemical properties of the outermost electron shells of their atoms because most chemical properties are determined by the orbital location of the electron present in the outermost shell.
- Element with atomic number 88 is Radium represented by the symbol Ra and it is the sixth element of group 2. It is silvery white and kept in the category of alkaline earth metals. The electronic configuration of the metal is represented by $[Rn]7{{s}^{2}}$ where Rn is radon which is a noble gas with Z = 86.
So, the correct answer is “Option D”.

Note: Atomic number is identical with the charge number of the nucleus. In an uncharged atom the atomic number is also equal to the number of electrons. The modern numbering system of group 1 to group 18 has been recommended by the International Union of Pure and Applied Chemistry (IUPAC).