Chemistry Test 2

Question 0

What was Democritus’ year?

Answer 0

460 BCE

Question 1

What did Democritus think about?

Answer 1

Thinks about atoms

Question 2

What was John Dalton the father of?

Answer 2

The modern atom structure

Question 3

John Dalton stated?

Answer 3

-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

Question 4

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

Answer 4

-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

Question 5

Neils Bohr

Answer 5

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

Question 6

Werner Heisenberg

Answer 6

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

Question 7

Erwin Schrödinger (1926)

Answer 7

• Electron location

- electron clouds

Question 8

Henri Becquerel

Answer 8

• Discovered natural radiation

- uranium on photo plate

Question 9

Robert minken

Answer 9

Discovered Electron Charge by using oil drop experiment

Question 10

Where is a proton located?

Answer 10

Nucleus

Question 11

What is a protons mass?

Answer 11

1.673 x 10^-27

Question 12

What is the relative mass of a proton?

Answer 12

1

Question 13

What does a proton do?

Answer 13

IDs the atom

Question 14

what is a neutrons mass?

Answer 14

1.675 x 10^-27

Question 15

What is a neutrons relative mass?

Answer 15

1

Question 16

What are extras about a neutron?

Answer 16

Isotopes stabilizes the nucleus

Question 17

What is the mass of an electron?

Answer 17

9.109 x 10^-31

Question 18

What is the relative mass of an electron?

Answer 18

0

Question 19

What are extras are on electrons?

Answer 19

Charge bonding

Question 20

What are isotopes?

Answer 20

Atoms of the same element with different mass numbers

Question 21

What is average atomic mass formula?

Answer 21

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

Question 22

Binding energy is?

Answer 22

Energy released when a nucleus is formed from nucleons

Question 23

What is Fusion

Answer 23

Combining at two nuclei to
form one nucleus of larger
mass

Question 24

Where does fusion occur naturally?

Answer 24

occurs naturally in stars.

Question 25

What is fission?

Answer 25

splitting of the nucleus into

two or more small nuclei

Question 26

What is strong force and what does it do?

Answer 26

It is the strongest

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

Question 27

What is electromagnetic force and what does it do?

Answer 27

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.

Question 28

What is weak force and what does it do.

Answer 28

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

Question 29

What is gravity?

Answer 29

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