CHAPTER 2: CHEMISTRY

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1

matter

  • the "stuff" of the universe
  • takes up space and has mass
2

states of matter

  1. solid - definite volume/definite shape
  2. liquid - definite volume/no definite shape
  3. gas - no definite volume/no definite shape
3

types of energy

  1. kinetic - energy in motion
  2. potenital - stored energy
4

forms of energy

  1. chemical - stored in bonds of chemical substances
  2. electrical - moving charged particles
  3. mechanical - directly involved in moving things
  4. radiant - travels in waves
5

composition of matter

  1. elements - cannot be broken down further by ordinary chemical methods
  2. atoms - identical particles or building blocks that make up an element
6

major elements of the human body

  1. oxygen
  2. carbon
  3. hydrogen
  4. nitrogen
7

atomic structure

nucleus

- neutrons

- protons

electrons (orbiting around the nucleus)

8

isotope

variations of an atom that differ in number of neutrons

9

molecules

two or more atoms held together by chemical bonds

10

compounds

two or more DIFFERENT atoms held together by chemical bonds

11

mixtures

not chemically bonded

12

solutions

homogeneous mixtures

solvent and solute

13

concentration of solutions

...