問題一覧
1
it has mass and volume
matter
2
the molecules are tightly bound to one another by molecular forces of attraction. has its own shape and fixed volume
solid
3
the molecules are weakly attracted to one another as compared to the solid phase. have fixed volume, but they take the shape of their containers
liquid
4
the attraction among molecules is the weakest. it does not have a fixed volume or shape
gas
5
a state is not permanent. change in pressure and temperature alter matter
phase change
6
when matter changes from solid to liquid
melting
7
when matter changes from liquid to solid
freezing
8
when liquid turns to vapor
vaporization
9
when vapor turns to liquid
condensation
10
solids can change directly to vapors
sublimation
11
properties that can be measured and observed without changing the materials chemical composition
physical properties
12
materials possibly to undergo chemical change in its chemical position
chemical properties
13
are substance specific properties that do not depend on the amount of the substance
intensive properties
14
properties that do depend on the amount of substance of the material
extensive properties
15
something that can not be broken down into simpler matter using physical methods
pure substances
16
a substance that cannot be broken down into simpler substance by chemical means
element
17
is made up of elements that are chemically bonded in fixed-ratio
compound
18
consists of two different elements
binary compounds
19
are forms of matter with no definite properties and are not combined chemically.
mixtures
20
it is a mixture that has uniform composition all throughout
homogeneous mixture
21
a mixture in which only one phase is visibly seen
solution
22
is the one being dissolved
solute
23
the dissolving medium
solvent
24
a solution that contains the maximum amount of solute that a given quantity of a solvent can dissolve
saturated solution
25
a solution having a lesser amount of solute than what the given quantity of solvent can dissolve
unsaturated solution
26
a solution containing solute that is more than what the given solvent can dissolve
supersaturated solution
27
it is a mixture has at least two different phases of matter or visible components
heterogeneous mixture
28
the atoms of an element that differ in the number of neutrons in their nuclei.
isotopes of the element
29
are atoms of the same element that have the same atomic number but different mass number
isotopes
30
one way to identify the different isotopes of an element is through a symbol called
isotope notation
31
is a pure substance that is made up of only one kind of atom
element
32
is the basic unit of matter
atom
33
one of the philosophers was ___ who first proposed the idea of an atom
leucippus
34
he is a student of leucippus, he posited that all matter was composed of small indestructible particles
democritus
35
atoms from the greek word ___ which means ___
atomos, indivisible
36
those who supported democritus and leucippus idea of a atom were called ___
atomists
37
the idea of atomic theory was revived by ___ and how many yrs (?) after democritus first proposed about it (2 ans pls)
john dalton, 2000 years
38
the total mass of substances before and after a complete reaction are equal
law of conservation of mass
39
elements combine in a fixed proportion to form a compound
law of definite proportions
40
in 1886, he discovered the positively charged subatomic particle as a component of an anode rays (also called (?) ) (2 ans pls)
eugen goldstein, canal rays
41
it was ___ who coined the term proton for the positively charged particle in an atom
ernest rutherford
42
using the crt experiment, ___ discovered that an atom is also composed of negatively charged particle which was named electrons
j.j. thompson
43
in 1932, ___ he discovered the neutral particles which he called neutrons in the nucleus of an atom
james chadwick