Physics Ch26.1/2

Question 1

The properties of the strong nuclear force are as follows:

Answer 1

The strong nuclear force acts over a very short range (~10􏰁15 m). The strong nuclear force is always attractive and acts with nearly
equal strength on protons and neutrons.
The strong nuclear force does not act on electrons; therefore, it has no effect on the chemical properties of an atom.

Question 2

Beta ray formula

Answer 2

N—> p+(-e)+(ve-)+energy

Question 3

Aluminum beta ray

Answer 3

Penetrates few mm ( both neg and positive)

Question 4

What are the 4 rays or energies emitted when a nucleus decays?

Answer 4

Beta ray(+)
Beta ray(-)
Alpha ray
Gamma rays

Question 5

Alpha ray loses?

Answer 5

Loses 2p and 2n

Question 6

Aluminum alpha ray?

Answer 6

It stops at the covering

Question 7

What is this called e+

Answer 7

Positron

Question 8

Beta ray (-) has a ____ nuclear reaction?

Answer 8

Weak nuclear reaction

Question 9

Beta ray(-) formula

Answer 9

Same as old but e and ve are positive

Question 10

Gamma ray properties?

Answer 10

It happens in series

Number of p and n are the Same

Question 11

Aluminum gamma?

Answer 11

Pass through sheet

Question 12

What is radioactivity?

Answer 12

The particles and photons emitted when a nucleus decays.

Question 13

Nuclear binding energy?

Answer 13

The difffrence in energy between a complete nucleus and it’s separated individual parts.

Question 14

When is the nuclear binding energy released?

Answer 14

Fusion and fission. The energy released in fusion or fission corresponds to a decrease in mass, according to Einstein.

Question 15

Fusion is?

Answer 15

When a small nucleus are fused together to form a larger nucleus

Question 16

Fission?

Answer 16

When a large nucleus decays into smaller nucleus

Question 17

What is the strong nuclear force?

Answer 17

The force that acts on the protons inside the nucleus, in a short range about 10^-15 m.

Question 18

Protons and neutrons are called?

Answer 18

Nucleons

Question 19

Most of the mass of the atom is in the ?

Answer 19

Nucleus

Question 20

Density of the nucleus

Answer 20

2.3 x 10^17 kg/m^2

Question 21

A is

Answer 21

Mass number/ atomic mass

Question 22

Atomic number is

Answer 22

Number of protons

Question 23

Isotopes have?

Answer 23

Diff neutrons same protons thus diff atomic mass

Question 24

The Atom is stable when?

Answer 24

Small atom n>z n=z

Question 25

Atom not stable when?

Answer 25

Z>n

Question 26

The constant repulsion force of 2 protons is

Answer 26

F= 230 N

Question 27

Distance between 2 protons

Answer 27

R= 10^-15

Question 28

Acceleration of the proton

Answer 28

1.4 x 10^29 m/s^2

Question 29

Formula of Columb’s law

Answer 29

F= ke^2/r^2

Question 30

Albert Einstein energy formula

Answer 30

E= mc^2