Please help can give brainliest! (must show work)

The discovery that the universe appears to be expanding led to a widely accepted theory called a.) the big bang theory b.) the doppler effect c.) hubble’s law d.) solar nebular theory e.) the seyfert theory

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

How many atoms of nitrogen are in the chemical formula ni(w on