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Flashcards in Chemistry Deck (48):
1

what is mass

weight of the matter

2

what is volume

how much space it takes up

3

explain a solid

low energy particles, vibrate, very close together

4

explain a liquid

medium energy particles, bounce around, not too close together

5

explain a gas

high energy particles, very fast, far apart

6

explain melting and freezing

melt= solid to liquid freezing= liquid solid

7

explain condensation and evaportation

condensation= gas to liquid evaporation=liquid to gas

8

explain sublimation and deposition

sub= solid to gas deposition= gas to solid

9

what is special about a element

has 1 atom

10

what is a compound

made of 2 elements

11

what is a homogenous mixture

same through out (peanut butter cookie)

12

what is a hetengenous mixture

not same through out (chip cookie)

13

how small is a atom

its the smallest thing in the world

14

proton charge

positive

15

electron charge

negative

16

neutron charge

neutral

17

whats a atomic mass

mass of one atom of element

18

whats a atomic number

location of element on table and how many protons

19

whats a ion charge

tells number of electrons that are loss/gained when ion is formed

20

whats a chemical family

in same vertical column and also share similar familys

21

what is a period

horizontal rows on periodic table

22

whats a valence shell

outer electron shell

23

what is cation

positive metals that take away electrons

24

what is a anion

negative non metals that borrow electrons

25

what is matter

anything that has a mass and volume

26

what are the 3 points of the kinetic molecular theory

all matter is made out of very small particles, there is empty space between the particles, and the particles are always moving

27

what does energy make particles do

the more energy a particle has, the faster they move and farther they get

28

what happens when the heat increases

more kinetic energy is made, particles move faster, and it expands

29

what happens when it becomes cooler

less kinetic, particles are slower, and it contracts

30

whats a melting point

when solid becomes liquid

31

whats a boiling point

when liquid becomes gas

32

explain density rules

floats in fluid= less dense, hovers in place=same density, sinks in fluid= more dense

33

explain physical change

properties remain same (can be turned back to normal), no new substance is made,

34

explain chemical change

product is different or new than the starting matter, new color or heat or bubbles

35

where are protons and neutrons found

nucleus of the atom

36

where do electrons travel

the shells

37

whats a isotope

atom with same amount of electrons and protons

38

what are the 3 classifications of elements

metals, non metals, metalloids

39

what are alkali

high reactive metals that react to ozygen and water

40

what are alkaline earth metals

less reactive metals, burn if heated

41

what are halogens

highly reactive non metals

42

what are noble gases

very stable non metals because they are full of electrons

43

what is a bohr model

shows all of the electrons in each shell

44

what is a valence shell

outer shell of a atom, holds up to 18 electrons,

45

what do atoms always want to be

stable

46

what will atoms do to stay stable

they take away or give away electrons from other atoms to refill the valence shell

47

what happens when a atom has gained/lost atoms

will become charged

48

whats is a compund

pure substance that is made out of at least 2 elements