An oxygen atom has eight protons and a hydrogen atom has one proton, How many electrons are in a hydroxide ion?
A. 8
B.9
C.10
D. none

The answer is C.

Explanation:

When hydrogen react with oxygen to form hydroxide ion, the electron in each element will add up together.

So 8-electrons of oxygen react with 1-electron of hygrogen to form 10-electrons of hydroxide.

In an element, atomic number(proton number) is equal to numbet of electrons.

the function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body. there are many functions of proteins. they are the basic building blocks of living things and are responsible for the growth and repair of body cells and tissues.

explanation:

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation: