Chapter 5, Problem 4CE

Interpretation Introduction

Interpretation:

The density for the synthetic element, roentgenium from the density of silver and gold is to be stated.

Concept introduction:

The elements in a modern periodic table are arranged in an increasing order of their atomic number. In the modern periodic table, the horizontal rows are known as periods, whereas vertical columns are known as groups. There are $7$ periods and $18$ groups in a modern periodic table.