Radioactivity and particles - Radioactivity

Question 1

What does atomic number mean

Answer 1

The number of protons in an atoms
(The same as proton number)

Question 2

What does the mass number mean

Answer 2

the total number of protons and neutrons in a nucleus.

Question 3

What does isotope mean

Answer 3

Atoms with the same number of protons but different numbers of neutrons

Question 4

What are alpha (α) particles, beta (β) particles, and gamma (γ) rays

Answer 4

Ionising radiations emitted from unstable nuclei i a random process

Question 5

practical: investigate the penetration powers of different types of radiation using either
radioactive sources or simulations

Answer 5

https://www.tutormyself.com/7-06-practical-investigate-the-penetration-powers-of-different-types-of-radiation-using-either-radioactive-sources-or-simulations/

Question 6

What is the atomic and mass number of an alpha particle

Answer 6

4
(α)
2

Question 7

What is the atomic and mass number of an beta particle

Answer 7

0
(β)
-1

Question 8

What is the atomic and mass number of an gamma ray

Answer 8

0
(γ)
0

Question 9

What is the atomic number and mass number of nuetron

Question 10

understand how to balance nuclear equations in terms of mass and charge

Answer 10

https://igcse-physics-edexcel.blogspot.com/2015/12/77-understand-how-to-complete-balanced.html?view=flipcard

Question 11

What are the sources of background (ionising) radiation from Earth and space

Answer 11

Naturally occurring radioactive minerals in the ground, soil, and water produce background radiation

Question 12

What does half-life mean

Answer 12

the time it takes for half of the unstable nuclei in a sample to decay or for the activity of the sample to halve or for the count rate to halve

Question 13

use the concept of the half-life to carry out simple calculations on activity, including graphical
methods

Answer 13

https://www.tutormyself.com/7-13-use-the-concept-of-the-half-life-to-carry-out-simple-calculations-on-activity-including-graphical-methods/

Question 14

What are uses of radioactivity in industry and medicine

Answer 14

follow reactions, track the distribution of a substance, diagnose and treat medical conditions
Other radioactive substances are helpful for controlling pests, visualizing structures, providing fire warnings, and for many other applications

Question 15

What does contamination mean

Answer 15

when an object is exposed to a source of radiation outside the object or defenitions are the wrong way around

Question 16

What does irritation mean

Answer 16

Exposing objects to beams of radiation

Question 17

What is the difference between contamination and irradiation

Answer 17

Contamination is when radioactive substances occur from inside something. Irradiation is when something is exposed to radiation on its outside.

Question 18

What are the dangers of ionising radiation

Answer 18

the radiation can cause mutations in living organisms
the radiation can damage cells and tissue
posing a threat to agricultural land, fishing waters, freshwater sources, and humans when disposed of