Ch.2 Basic Chemistry

Question 1

Atoms

Answer 1

Smallest functional units of matter that retain physical properties of that element

Cannot be further broken down into other substances by ordinary chemical or physical means

Question 2

3 subatomic particles

Answer 2

Protons- positive, found in nucleus, has mass, gives identity
Symbol: p+

Neutrons- neutral, found in nucleus, number can vary, has mass gives weight
Symbol: n•

Electrons- negative, found in orbit, has particularly no mass gives reactivity
Symbol: e—

Question 3

All life forms composed of matter

Answer 3

1: matter- contains mass and occupies space
2: energy- not matter can do work