Chapter U1, Problem 5STP

Interpretation Introduction

Interpretation:

The element having similar properties with the given element needs to be identified.

Concept introduction:

The elements are arranged in the periodic table in order of increasing atomic number. All of these elements shownumerous other trends and the periodic law and table can be used to explain their physical, chemical, and atomic properties.

Answer to Problem 5STP

Option (b) Bromine (Br).

Explanation of Solution

The element shown is figure contains, 18 neutron and 17 proton it means the atomic number of the given element is 17. It is known that theatomic number of any element is equal to the number of protons present in its nucleus and the atomic mass is equal to the sum of the number of protons and number of neutrons present in the nucleus.

Based on the above explanation, the given element is chlorine, which is from halogen family in the periodic table. And according to the question the correct choice is bromine because it is also from halogen family.

So, correct answer is option (B) bromine (Br).