When an element ejects an alpha particle, the atomic number of the resulting element

When a wave source in air exceeds the speed of sound, the result is a

What is the name of the following compound? CO 2

When  Ra decays by emitting an alpha particle, what is the atomic number of the resulting nucleus? What is the resulting atomic mass?

If you mix a typical aluminum ion (Al, atomic no. = 13) with a typical oxygen ion (O, atomic no. = 8), what compound is formed?

When sound or light undergoes interference, it can sometimes

Given the following generic chemical reaction, which is the reactant? X → Y

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Carefully examine the following reaction sequence for the catalytic formation of ozone, O 3, from molecular oxygen, O 2. Which chemical compound is behaving as the catalyst?  O 2 + 2 NO → 2 NO 2  2 NO 2 → 2 NO + 2 O  2 O + 2 O 2 → 2 O 3

Clouds are white because of scattering from