Particle Numbers

Question 1

protons relative mass and charge?

Answer 1

relative mass = 1
relative charge = +1

Question 2

neutrons relative mass and charge?

Answer 2

relative mass = 1
relative charge = 0

Question 3

electrons relative mass and charge?

Answer 3

relative mass = 0.0005
relative charge = -1

Question 4

where are protons and neutrons found in an atom?

Answer 4

in the nucleus in the centre of the atom

Question 5

where are electrons found in an atom?

Answer 5

in energy levels (shells) around the nucleus

Question 6

what does the atomic number show?

Answer 6

the number of protons and electrons

Question 7

what does the mass number show?

Answer 7

the total number of protons and neutrons

Question 8

what is the definition of an isotope?

Answer 8

isotopes are atoms with the same number of protons but different numbers of neutrons

Question 9

what does the number next to the name of an isotope show? e.g. hydrogen-2

Answer 9

the mass number

Question 10

what is the relative atomic mass?

Answer 10

the average mass of an atom of an element, taking into account the different masses of each isotope