Answer:
They are all alkali earth metals.
Explanation:
Their valence shell each has 2 electrons. Also, they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure. They form alkaline solutions, hydroxides, when reacting with water and their oxides are found in the earth’s crust.
Answer:
I think that it might be 2.7
Explanation:
The number of waves passing in a certain amount of time
Answer:
An Atom
Explanation:
An atom is the smallest unit of matter