Topic 1 Atomic Structure and the Periodic Table Flashcards
What is the charge of a proton
+1
What is the charge of a neutron
0
What is the charge of an electron
-1
what is the mass of a proton
1
what is the mass of a neutron
1
what is the mass of an electron
1/1840
What does the atomic mass relate to
The number of protons in the element
What does the mass number relate to
The number of protons + neutrons in an element
What is an isotope
When an element has the same number of protons but different numbers of neutrons
What is a mass spectrometer
It measures the masses of atoms and molecules
What are the 2 trends in ionisation energies across the periodic table
1) across a period
2) down a group
What is periodicity
Looking at repeating patterns across a period of the periodic table
What is Relative Atomic Mass (Ar)
the weighted mean (average) mass of an atom of an element compared to 1/12 of the mass of an atom of carbon-12
What is Relative Isotopic Mass
the mass of an individual atom of a particular isotope relative to 1/12 of the mass of carbon-12
What is Hund’s Rule
Electrons will occupy the orbitals singly before pairing takes place
