The elements in groups 1a through 7a are
a. alkali metals.
b. alkaline earth metals.
c. transition metals.
d. representative elements.

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

Why is the structure of molecule important to its function?

Adepositional also feature that forms where a stream enters a lake or an ocean is a