Describe the relationship between hydrogen oxygen and water

What semimetal can form four single covalent bonds.

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles