Nuclear chemistry

Question 1

occur when the outermost or valence electrons aroundthe nucleus interact.

Answer 1

Nuclear Chemistry

Question 2

he discovered that uranium

emitted radiation.

Answer 2

Henry Becquerel

Question 3

She was the first woman to win the Nobel Prize for the discovery of
radioactivity along with her husband Pierre and Becquerel.

Answer 3

Marie Curie

Question 4

Marie Curie won another Noble

prize for discovering the radioactive elements _______ and ________ .

Answer 4

Radium and Polonium

Question 5

The spontaneous breakdown of an atom by emission of particles and/or radiations.

Answer 5

Radioactivity

Question 6

All elements having an atomic number greater than __

are radioactive.

Answer 6

83

Question 7

It is the number of protons in its nucleus

Answer 7

Atomic number

Question 8

The atomic number also specifies the

number of __________ present.

Answer 8

Electron

Question 9

the sum of the numbers of protons and

neutrons in its nucleus

Answer 9

Atomic number

Question 10

elements that have the same mass

number but different atomic numbers

Answer 10

Isobars

Question 11

nuclides that have the same

number of neutrons but have different atomic number.

Answer 11

Isotones

Question 12

have the same atomic number, atomic mass and number of neutrons, but with different energies

Answer 12

Isomers

Question 13

nuclides that have the

same atomic number but different mass number

Answer 13

Isotopes

Question 14

4 types of nuclear reaction

Answer 14

radioactive decay,
nuclear transmutation,
nuclear fission
nuclear fusion

Question 15

Tell if it is chemical or nuclear reaction :

Atoms are rearranged by the breaking
and forming of chemical bonds

Answer 15

Chemical Reaction

Question 16

Tell if it is chemical or nuclear reaction :

Elements are converted to another
element

Answer 16

Nuclear reaction

Question 17

Tell if it is chemical or nuclear reaction :

Proton, neutron, electron, and positron
are involved.

Answer 17

Nuclear reaction

Question 18

Tell if it is chemical or nuclear reaction :

Reactions involved absorption and
released of small amount of energy

Answer 18

Chemical Reaction

Question 19

Tell if it is chemical or nuclear reaction :

Rates of reaction are not affected by
surface area, concentrations,
temperature, pressure, and presence
of catalysts.

Answer 19

Nuclear reaction

Question 20

How to tell if nuclear reactions are balanced

Answer 20

The total number of protons plus neutrons in the products and in the reactants are the same

The total number of nuclear charges in the products and in the reactants
are the same

Question 21

Symbol of proton in N.R

Answer 21

1 1
H or P
1 1

Question 22

Symbol of neutron in N.R

Answer 22

1
N
0

Question 23

Symbol or electron / Beta (β)

particle

Answer 23

0 0
ℯ β
−1 or -1

Question 24

Symbol of positron

Answer 24

0 0
ℯ β
+1 or +1

Question 25

Symbol of Alpha (α) particle

Answer 25

4 4 He or α 2 2

Question 26

Symbol of Gamma

Answer 26

0 y 0

Question 27

spontaneous decay or disintegration of unstable atomic nucleus which is accompanied by the emission of ionizing radiation such as electron, proton, and neutron. R

Answer 27

Radioactivity

Question 28

s a process in which the nucleus spontaneously | disintegrates giving off radiation.

Answer 28

Radioactive decay

Question 29

change that takes | place in the nucleus of an atom to make it stable

Answer 29

radioactive decay

Question 30

a type of radioactivity in which alpha (α) particles are | ejected.

Answer 30

alpha decay

Question 31

contains 2 protons and 2 neutrons lightly bound | together.

Answer 31

alpha particle

Question 32

Radioactive process if the atomic number of the nuclide changes but the mass number does not change.

Answer 32

Beta decay

Question 33

In this process, electron is ejected from a nucleus and in the process a neutron is converted into a proton.

Answer 33

b. Beta Decay