Elements in a vertical column on the Periodic Table have similar properties and are all members of the same of elements.
ME
A
molecule
HD
B
phase
С
atom
D
group

What semimetal can form four single covalent bonds.

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution