elements, isotopes and relative atomic mass gcse chemistry aqa

equation for relative atomic mass=

sum of (isotope abundances x isotope mass)/100

what is an isotope?

different forms of the same element that have the same number of protons but a different number of neutrons

what is abundance?

how common or rare that isotope is shown as percentages/100

what is relative atomic mass?

average mass of all isotopes that make up an element

what sub-atomic particle determines the chemical properties of an element?

the electron

what sub-atomic particle that determines what element it is?

the proton

what is the structure of an atom

a central nucleus comprising of protons and neutrons with electrons orbiting the nucleus in shells

what is the size of the atom?

0.1 nanometers

what is the size of the nucleus of the atom?

it is 1/10,000 of the atom

what is the relative charge of a proton?

+1

what is the relative charge of an electron?

-1

what is the relative charge of a neutron?

0

what is the relative mass of a proton?

1

what is the relative mass of an electron?

1/2000 or very small

what is the relative mass of a neutron?

1