Answer:
Most spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as the bulge. ... The spiral arms are sites of ongoing star formation and are brighter than the surrounding disc because of the young, hot OB stars that inhabit them.
Explanation:
reactants because it had other chemicals, when more are mixed it will be more stronger.
It is the correct answer
Atomic number should be the answer
Water has h bonding
H-H
Sodium fluoride
I think
