Question

Which of the following statements is/are true?
A. Among all the naturally occurring elements, around $80\% $ are metals.
B. Non-metals are more abundant than metals
C. Sodium and potassium are soft like wax
D. Bromine is a reddish brown liquid at room temperature

Answer 1

Hint:We know that there are about $118$ elements that have been introduced in the periodic table. These elements are classified into three. They are metals, nonmetals and metalloids. Metals generally come in the left side of the periodic table and nonmetals on the right.

Complete step by step answer:
Modern periodic table was introduced on the basis of the increasing atomic number. Periodic law was the principle behind this. It states that the properties of these $118$ elements are based on their atomic numbers.
The periodic table consists of groups and periods. The vertical column represents the groups and the horizontal rows represent the periods. There are seven periods and eighteen groups.
Metals are the elements which show the characteristics like malleability, ductility, luster, conductivity of electricity etc. Non-metals are the elements which show the characteristics like poor conductivity of heat and electricity. While metalloids are the elements which show the properties of both metals and nonmetals.
There are about $95$ metals, $17$ nonmetals and $6$ metalloids in the periodic table. Thus we can say that about $80\% $ of the elements in the periodic table are metals.
Also, metals like sodium and potassium can be cut using a knife.
Bromine water which we use for qualitative analysis of organic compounds is a reddish brown liquid at room temperature.

Thus, in the given options, A, C and D are correct.

Note:
Some metals show anomalous behavior like sodium and potassium. Sodium and potassium are metals. But they are not hard as all other metals. Bromine is an example of non-metal. The color of bromine is reddish brown both in liquid and gaseous phase.