atomic structure

Question 1

what is an atom

Answer 1

an atom is the smallest particle of an element that can exist by itself and still have the same chemical properties as the element

Question 2

what are the subatomic particles

Answer 2

1. nucleus
2. protons
3. neutrons

Question 3

what are the characteristics of the subatomic particles

Answer 3

proton has a relative charge of +1 and a relative mass of 1

Question 4

characteristic of neutron

Answer 4

relative charge of - and relative mass of 1

Question 5

characteristic of electrons

Answer 5

relative charge of -1 and relative mass of 1/1840

Question 6

what is atomic number

Answer 6

atomic number is the number of protons in the nucleus of one atom of an element

Question 7

what is mass number

Answer 7

mass number is the total number of protons and neutrons in an element

Question 8

how to find number of neutrons

Answer 8

mass number- atomic number

Question 9

what is an isotope

Answer 9

an isotope are different atoms of a single element that have the same number of protons but different number of neutrons

Question 10

what is an isotopy

Answer 10

isotopy is the occurrence of atoms of a single element that have the same number of protons but different number of neutrons

Question 11

what is radioactivity

Answer 11

Radioactivity is the emission of particles and electromagnetic rays from the nucleus of an unstable atom

Question 12

what are 3 uses of radioactive isotopes

Answer 12

1. cancer treatment
2. heart pacers
3. tracer

Question 13

explain the cancer treatment

Answer 13

cancerous tumor cells can be destroyed by radiation beam from radioactive cobalt-60 at the cells or it can be injected directly into the tumor

Question 14

explain the heart pacers

Answer 14

these heartpacers are powered by chemical batteries. the batteries contain plutonium-28 which lasts up to 87 years