Im not really sure , but it might have something to do with polar chemical compound <span />
All elements are made of "atoms", and an atom is made up from 3 basic particles: Electrons are particles with a negative charge :)
2 then 1 then 3 you're welcome
Explanation:
1. Earth is 13 million years older than moon... Moon is 4.53 billion years ago and earth is 4.543 billion years ago.
Much younger than earth.
2.moon has small iron core or lacks sizable iron core.
3 galaxies not considered in solar system bcoz
solar system is the part of milky way galaxy..
4. Hydrogen and helium
5. Venus bcoz it is closest to Sun.