Plzz Help with chemistry homework!

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

What is the measured amount of a product obtained from a chemical reaction?

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.