science18 cards

Tagged as: physics, earth

 copy deck Copy deck

1

what is potential energy

energy stored depending on position

2

what is kinetic energy

energy in motion

3

what is an atom

makes up everthing protons are posotive electrons are negitive and nutrons are nutral 1 nutron is one A.M.U.

4

what are eliments

a pure substance that cant be broken down by ordinary means

5

what are compounds

2 or more different elements chemicaly combined

6

substances

mixtures 2 or more substances not chemicaly combined solutions are evenly mixed substances chem. or none chem. combined

7

molecules

2 or more atoms chemicaly combined

8

mass

the amount of matter in something

9

volume

the amount of space something takes up

10

heterogeneouse

evenly mixed

11

homogeneousf

unevenly mixed

12

ion

an atom that has gained or lost an electron, ions that loose are possotive vice versa

13

alkaline metals

1 valence electron most reactive

14

alkaline earth metals

2nd most reactive

15

transition metals

collom 3-12 verring valenc electrons frome 2-4

16

rutherford

discovered nucleouse was posotively charged ans that most of an atom is empty

17

mendeleev

put together the first periodic chart

18

isotope

an atom with a different number of nutrons