They believe that a cloud of gas (nebula) starts being pulled together by gravity to the point where it is so small, it starts nuclear fusion. This then start the stars life.
Answer:
Phosphorus, chlorine and selenium.
Explanation:
If you look at a periodic table, you will notice that phosphorus, chlorine and selenium are all in groups 15-17. Elements in these groups are more likely to gain electrons then they are to lose them, thus making them more likely to form an anion.
This is because they want to fill their outer valence shell of electrons so that they can have a full octet and for groups 15-17 it’s easier to gain 1-3 electrons then it is to loose 5-7 electrons.
requires a medium to propagate
Explanation:
due to radiation z a dispersion of light ray into different multiple
Answer:
gains 2 electrons. In order for the new ionic compound to form a a neutral compound, the oxygens must gain 6 electrons