Blue light in the visible spectrum has a frequency of approximately 630 THerz (I THerz = 102 cycles/sec). What is the wavelength of this light?

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

Iwill give extra points to who gets this right

What is true for a substance that releases energy