Give the IUPAC name for this molecule

Explanation:

From the question the molecule here contains a double ring .

Following the rules of naming bicyclic compounds the IUPAC name of the molecule is

2 - ethyl - 4 - methyl bicyclo[ 2.2.2] octane

Hope this helps you

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.