When an electron of an atom returns from an excited state to the ground state, it emits energy in the form of a photon. How does the change in energy level compare to the energy of the emitted photon?

For any chemical reaction at equilibrium, the rate of the forward reaction is A. less than the rate of the reverse reaction B. greater than the rate of the reverse reaction C. equal to the rate of the reverse reaction D.

3CaCl2 what's the number of atoms

Mg + 2 + 2e - → Mg oxidation or reduction

Why is coal non renewable

How many protons are present in an atom which has an atomic number of 36? Answer in units of protons.

Which of these is a covalent compound? 1. AICI3 2. CO 3. MgO 4. LiCI

What is a protein used for

Atoms of the halogen family typically steal two electrons from other atoms when they react true or false

Looking at the periodic table, which group consists of elements that will not form an acid when combine with hydrogen? A) radon, neon, calcium B) neon, bromine, barium C) beryllium, iodine, krypton D) lithium, potassium, fluorine

Mixtures have (exact, relative) amounts of the same substances