science- atoms test

Question 1

gamma rays

Answer 1

are the release of pure energy, usually occurring after the element has undergone alpha or beta decay. The energy that has built up during the decay is released. The energy does not change the element like alpha and beta

Question 2

radioactive material

Answer 2

is a radioisotope (unstable) which emits radiation , when exposed to organic life/other atoms, has the ability to change the atomic structure of the element it comes in contact with.

Question 3

What is a harmful about radioactive material

Answer 3

can cause cancer, death

Question 4

where is radioactive material found naturally

Answer 4

space,sun rays, soil

Question 5

Fusion

Answer 5

Combining small atoms into bigger ones which produce large quantities of energy

Question 6

Fission

Answer 6

Splitting of large atoms into smaller ones which produce large quantities of energy

Question 7

valence electrons

Answer 7

The electrons in the outer most shell

Question 8

radiation

Answer 8

energy released as unstable atoms decay into more stable forms

Question 8

radioisotopes

Answer 8

radioisotopes are the unstable form of an element that emits radiation to transform into a more stable form. Radioactive decay is the only way to make them stable

Question 9

beta particles in a smoke detector

Answer 9

have a higher penetrating power than alpha particles, so they would pass through the smoke and not trigger the alarm.

Question 10

An example of fusion

Answer 10

The sun, as all day everyday it uses fusion

Question 11

An example of fission

Answer 11

nuclear power plant

Question 12

why do we use carbon 14 in half lide

Answer 12

because carbon-14 is measuarble and in the atmosphere, we also know how long it takes to decay.

Question 13

Why are X-rays and gamma rays used in medical imaging?

Answer 13

to generate images of tissues and structures inside the body.