Which one of the following phrases describes an a1 atom?

The nuclear fission process releases neutrons and question 27 options: alpha particles electrons energy beta particles

How have the greenhouse gasses increased from the year 2000 to 2018

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium