Atomic Structure Flashcards
What is the formula for relative atomic mass?
( mass numbers x abundances ) ➗ total sum of the % abundances
What is the definition of an isotope?
An isotope is an atom with the same number of protons but a different number of neutrons. (They have the same atomic number but different atomic mass!)
What does the period number and group number indicate?
Period number: amount of shells
Group number: how many electrons on outershell
What makes two atoms the same element?
The number of protons determines what type of atom it is.
What is the mass and charge of a proton?
Mass: 1
Charge:+1
What is the mass and charge of a neutron?
Mass:1
Charge:0
What is the mass and charge of an electron?
Mass: 1/1800
Charge: -1
How would you work out the atomic number and mass number?
Atomic number: protons
Mass number: number of protons + number of neutrons.
How to find the number of protons / or electrons?
Look at the Atomic Number!
How to find the number of neutrons?
Do: Mass Number - Atomic Number!
