Atomic Structure Flashcards
What are the subatomic particles of an atom?
Proton, neutron, electron
Relative charge of a proton is..
+ 1
Relative charge of a neutron is…
0
Relative charge of an electron is…
-1
Relative mass of a proton is…
1
Relative mass of a neutron is…
1
Relative mass of an electron is…
Very small , 1/1840
What is atomic number?
Number of protons ( and electrons as they have the same amount)
What is mass number?
Total number of protons and neurons
What is an atom?
An atom is the smallest particle of matter in an element
What is an ion?
An ion is a charged atom meaning it has lost or gained electrons
What is a molecule?
A molecule is a group of 2 or more atoms that are chemically bonded.
What is an isotope?
The same element with different number of neutrons but the same number of protons
Define relative atomic mass
It is the average mass of an atom of an element compared to 1/12 of the mass of an atom of carbon12
Define relative formula mass
The sum of all the atomic masses of each atom in a molecule
Define isotopic Mass
Mass of one atom of one isotope of an element relative to 1/12 of the mass of an atom of carbon-12
Define relative molecular mass
Sum of the reactive atomic masses of all the atoms in the molecular formula of an element or compound
How to work out relative formula / molecular/ isotopic
Add up each atomic mass of each compound / molecule ect…
