Y9 chemistry 2 Flashcards
Nucleus
Positive charged centre of atom
Protons
Positive charged particle found in in the nucleus
Proton=
Relative mass-
Charge-
Charge= +1
Relative masses= 1
What is an electron
Tiny particle with a negative charge that orbits the nucleus
Electron=
Relative mass-
Charge -
Charge= -1
Relative mass= 0
What is an neutron
A particle that has no charge found in the nucleus
Neutron
Relative mass-
Charge -
Charge= 0
Relative mass = 1
Ion
Particle that is electrically charged (positive or negative)
Base
The oxide hydroxide or carbonate of a metal that reacts to make a salt
Displacement reactions
A chemical reaction here an element reacts with a compound
Noble gases
Very unreactive gases found in group 0 of the periodic table
Isotopes
1 or more atoms with the same atomic number but different numbers of neutrons
Atomic mass number
Sum of neutrons and protons in nucleus (top one)
Atomic number
The number of protons = to electrons (bottom one)
Reactivity series
A list of metals ranked in order of reactivity
Electronic configuration
A set of numbers to show the arrangement of electrons in a shell
Neil’s Bohr
Came up with shells around the nucleus
James Chadwick
Discovered neutrons
Rutherford
Discovered the nucleus from the gold foil theory
JJ Thomson
Discovered electrons made the plum pudding model
Plum pudding model
an atom is a sphere of positive charge, with negatively charged electrons in it
How many electrons are
In the first shell
2
How many electrons are allowed in the other shells
8
Acid + metal oxide =
Salt + water
Acid + metal =
Salt + hydrogen
Acid + metal carbonate
Salt + carbon dioxide + water
Row on the periodic table is called
Period
Column on the periodic table is called
Group
Acid + metal hydroxide =
Salt + water
What is the plum pudding
Model
Atoms as raisins that charged the neutron ( pudding) in a sphere
