Lecture 3

Question 1

nucleus

Answer 1

Has protons and neutrons called nucleons

Question 2

Nuclide

Answer 2

Nucleus with a particular composition

Question 3

Types of Decay

Answer 3

1. Alpha decay
2. B- beta decay
3. B+ positron emission
4. Electron capture
5. Gamma decay

Question 4

Chemical reaction

Answer 4

1. Reaction involves only electrons (the outer most ones)
2. Reaction rate increased by temperature
3. Energy in the reaction is comparatively small
4. Mass is conserved

Question 5

Nuclear reaction

Answer 5

1. Atoms change from one element to another
2. Reactions involve mainly protons and neutrons
3. Reaction rate is unaffected by a change in temperature
4. Reactions sometimes involve enormous changes in energy
5. Change in mass due to change in energy

Question 6

Geiger counters

Answer 6

is an electronic instrument used for detecting and measuring ionizing radiation

Question 7

Balancing nuclear equations conserve…

Answer 7

Mass number and atomic number

Question 8

Nuclear decay: n/p>1

Answer 8

Beta decay
N->P

Question 9

Nuclear decay: p/n>1

Answer 9

B+emission decay
P -> N

Question 10

Nuclear decay: above band of stability

Answer 10

Alpha decay (all elements beyond Bi show alpha decay- radioactive)