1. List 3 physical and chemical phenomena 2. What are the main conditions for the reactions to take place
3. Explain how an ionic bond is different from a covalent bond

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus.b) the number of neutrons it contains in its nucleus.c) the number of protons it has in a cloud around the nucleus.d) the number of neutrons it has in a cloud around the nucleus.e) the number of electrons it exchanges with its neighbors.

How many grams are in one mole of lead?

Acompound has the molecular formula c3h8. which class of organic compounds does it belong to?