Who taking bf applications

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.

Nuclear decay is the spontaneous decay of one element into a. an x-ray b. a ray of light c. another element