PLEASE HELP ME ANSWER THIS, THANKS 1. What joins hydrogen and oxygen together in water?

2. Ionic bonds involve the transfer of electrons from one atom to another.

3. is known as

4. Each type of atom has a unique based on the number of protons

1. Polar Covalent Bond

2. True

Explanation:

.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).