Atoms Quiz Flashcards

1
Q

Democritus (major contribution including specific experiment)

A

-prove the existence of atoms
-theorized atoms were tiny and indivisable
-atomos

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Democritus (model)

A

atomic model (just a circle)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Democritus (how it changed from the previous model)

A

first atomic model created

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Dalton (major contribution including specific experiment)

A

Daltons 4 part theory:
1.All Matter is Composed of Atoms (false)
2. Atoms of a Given Element are Identical (false)
3. Compounds are Formed by Combining Atoms (true)
4. Chemical Reactions Involve Rearrangement of Atoms (true)
-nitric oxide experiments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Dalton (Model)

A

Billard Model just a circle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Dalton (how it changed from the previous model)

A

model didn’t change but the understanding did

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Thompson (major contribution including specific experiment)

A

-discovered the electron
-did this using the cathode ray tube experiment
-proposed atoms are not inadvisable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Thompson (model)

A

The plum pudding model. Was a circle with electrons suspended in it.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Thompson (how it changed from the previous model)

A

said there were smaller particles inside an atom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Rutherford (major contribution including specific experiment)

A

-used the gold foil experiment
-atom mass is in the tiny positively charged center
-discovered the proton

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Rutherford (Model)

A

nuclear model. was a circle with positively charged protons in the middle and electrons on the outside

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Rutherford (how it changed from the previous model)

A

electron is orbiting around the positively charged center

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Bohr (major contribution including specific experiment)

A

-electrons orbit the nucleus at fixed energy levels
-light come when electrons jump levels
-built on the gold foil experiment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Bohr (Model)

A

Bohr model (planetary model). Kind of like the model we now use.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Bohr (how it changed from the previous model)

A

electrons only orbit at fixed levels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Chadwick (major contribution including specific experiment)

A

-discovery of the neutron
-also discovered that it was neutral
-beryllium experiment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Chadwick (Model)

A

Chadwick model. It had neutrons and protons in the nucleus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Chadwick (how it changed from the previous model)

A

built on the Rutherford model. added neutron the the nucleus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Order of atomic discoveries names

A

Democritus, Dalton, Thompson, Rutherford, Bohr, Chadwick

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Conservation of mass

A

whenever matter changes, the total mass of the products of the change is the same as the total mass of the reactants.

21
Q

Law of Definite proportions

A

every chemical compound contains fixed proportions (by mass) of its constituent elements. (ex. table salt at home is the same as table salt at school)

22
Q

What holds the nucleus together

A

strong nuclear force

23
Q

what keeps the electrons in orbit

A

electromagnetic force

24
Q

weight of proton

25
weight of neutron
1 AMU
26
weight of electron
0 AMU
27
AMU=
atomic mass unit
28
about amu's
-1 AMU is very close to the mass of a p or n -but not quite (the atomic mass has electrons in it too)
29
what is the atomic number
the number of protons in an element. it defines the element
30
what does the atomic number mean in a neutral atom
it means it is the number of electrons
31
what is the mass number
mass number is the total protons and neutrons in an atom. It goes above the letter in nucleur notation and is after the hyphen in hyphen notation. you can also round the decimal under the letter to get
32
what are isotopes
they are atoms of the same element with different numbers of neutrons
33
Nuclear Notation
mass # is above then the symbol them the atomic number is below
34
what does an ion look like
a + or - number with the element symbol
35
ion
gained or lost and electron
36
if you gain an electron
it becomes smaller because electrons are negative
37
if you lose an electron
it becomes bigger because electrons are negative
38
Hyphen Notation
another way to label isotopes. carbon-14. means that this carbon has a mass number of 14
39
electrons (what we know)
-electrons further from the nucleus have a higher energy -further levels can hold 2n squared electrons where n is the level
40
Law of multiple proportions
a.k.a. daltons law whenever two elements from more than one compound the different masses of one element that combine with the same mass of the other element are in the ratio of small whole numbers
41
Average atomic mass
weighted average mass of an element isotope, measured in AMU's. is the decimal under the letter on the periodic table
42
How to find protons
atomic number
43
how to find electrons
atomic number if neutral
44
How to find neutrons
mass number-atomic number
45
weighted averages
(abundance 1)x(mass1)+(abundance 2)+(mass 2) etc...
46
Mole
1 mol of a thing= 6.02x10e23 of those things
47
Avogrados number
6.02x10e23
48
Molar Mass
1 mole=molar mass in g
49
Gases at STP number
22.4 L