atomic structure Flashcards
relative mass of a proton
1
relative mass of an electron
1/1840
relative mass of neutron
1
relative charge of an electron
-1
relative charge of a neutron
0
relative charge of a proton
+ 1
explain why atoms are neutral
they have the same number of positive protons as negative electrons
define the term ‘isotopes’
isotopes are atoms with the same number of protons but a different number of neutrons
how do you find the mass number
protons + neutrons added together
how do you find the atomic number
it is the same as the proton and electrons numbers
calculate the relative atomic mass
(mass x abundance) + (mass x abundance) / total abundance
how to find the amount of occupied electrons shells
you look at the period it is in
how to find the amount of outer-shell electrons
you look at the group it is in
what is the definition of an atom
the smallest particles of an element that consists of electrons surrounding a nucleus that contains neutrons and protons
define relative atomic mass
the weighted average mass of all the isotopes of an element compared to 1/12th of the mass of carbon 12
what is a nucleon
same as the mass number
atoms are arranged in the period table in the order of what
proton number
what is RAM
the weighted average mass of all the isotopes in an element compared to 1/12th of the mass of carbon-12
