cc3-atomic structure Flashcards
How do you calculate the Ar of an element
RAM= (isotope abundance x isotope number)/100
Name the three subatomic particles as well as their relative mass and charge
Protons: M: 1 C +1 Neutron: M: 1 C Neutral (0) Electron: M: 1/1835 (negligible) C -1
describe the structure of an atom
Protons and neutrons centred in a nucleus.
Electrons orbiting outside in electron shells
what is a mass number
the number of protons and neutrons in an atom
the top number in the symbol for an element
what is an atomic number
the number of protons in an atom
the bottom number in the symbol for an element
what is an isotope
an isotope is an atom of the 𝘀𝗮𝗺𝗲 𝗲𝗹𝗲𝗺𝗲𝗻𝘁 with the same number of 𝗽𝗿𝗼𝘁𝗼𝗻𝘀 but different number of 𝗻𝗲𝘂𝘁𝗿𝗼𝗻𝘀
Name the three base rules of atomic theory
All matter is made up of atoms
Atoms cannot be broken down into smaller parts
Atoms cannot be created or destroyed
What is an atom
An atom is the smallest piece off an element that can exist
What is a compound
Atoms of different elements combined together
Who made the plum pudding model
John dalton
What is the plum pudding model
A ball of positive charge with negatively charged electrons mixed into the ball
What is Rutherfords nuclear model
An atoms mass is concentrated in the nucleus which contains positively charge particles (protons)
What is the Morden atom model
Electrons orbit a nucleus with no charge
What term is given to a specific nucleus that contains a certain number of protons and neutrons
Nuclide
Key features of chemical reactions
- no atoms are created or destroyed
-measurable energy change
-at least 1 new substance is formed
(Compounds are broken up or formed)
