Chemistry Test 2 Flashcards Preview

Earth Science > Chemistry Test 2 > Flashcards

Flashcards in Chemistry Test 2 Deck (30):
0

What did Democritus think about?

Thinks about atoms

1

What was Democritus' year?

460 BCE

2

What was John Dalton the father of?

The modern atom structure

3

John Dalton stated?

-states All matter is
made of atoms. atoms are
indivisible and Indestructible
-all atoms are Identical
in mass and properties
-Compounds are formed by a
combination of two or more
different kinds of atoms

4

Joseph John (JJ) Thomson (1897) did what?

-Discovered the electron
-came up with the plum
Pudding model of the atom
-Gold foil experiment
-discovered nucleus and that was
the nucleus was positive
-planetary model

5

Neils Bohr

-Adjusted Rutherford's Model
-electrons could move
only in fixed orbits of specific energies

6

Werner Heisenberg

Adjusted Bohr's model into modern model of the Adam.

7

Erwin Schrödinger (1926)

-Electron location
-electron clouds

8

Henri Becquerel

-Discovered natural radiation
-uranium on photo plate

9

Robert minken

Discovered Electron Charge by using oil drop experiment

10

Where is a proton located?

Nucleus

11

What is a protons mass?

1.673 x 10^-27

12

What is the relative mass of a proton?

1

13

What does a proton do?

IDs the atom

14

what is a neutrons mass?

1.675 x 10^-27

15

What is a neutrons relative mass?

1

16

What are extras about a neutron?

Isotopes stabilizes the nucleus

17

What is the mass of an electron?

9.109 x 10^-31

18

What is the relative mass of an electron?

0

19

What are extras are on electrons?

Charge bonding

20

What are isotopes?

Atoms of the same element with different mass numbers

21

What is average atomic mass formula?

[(Mass)(%)+(mass)(%)]/100

22

Binding energy is?

Energy released when a nucleus is formed from nucleons

23

What is Fusion

Combining at two nuclei to
form one nucleus of larger
mass

24

Where does fusion occur naturally?

occurs naturally in stars.

25

What is fission?

splitting of the nucleus into
two or more small nuclei

26

What is strong force and what does it do?

It is the strongest
of all four forces.strong force opposes the electromagnetic force of protons.strong force is like a glue

27

What is electromagnetic force and what does it do?

Electromagnetic force can either attract or repel the particles on which it acts. It combines the effects of electrical charge and magnetism. Electrons are kept in the orbit around the nucleus.

28

What is weak force and what does it do.

Weak nuclear force is the SECOND WEAKEST force. Responsible for stabilizing particles through the process of radioactive decay.

29

What is gravity?

WEAKEST of the four forces.Force of attraction between all objects in nature.