In group 1, elements get more reactive going down the group. Sodium is more reactive than lithium since when going down, each element gains an extra valence electron, and the outer shell electrons get further and further away from the nucleus while also becoming more in number. Due to this, the element becomes unstable and more reactive.
A fish is a living thing and a rock is not
Answer:
a i think i hope this hepls
Explanation:
C
These are all isotopes of Hydrogen and they differ from one another because of their different number of neutrons.
