Chemistry Paper One 2018 Flashcards
What is the atomic number?
The smallest number
Amount of protons or electrons in an atom
What is a mass number?
The largest number.
The number of protons and neutrons
How do you work out the number or protons, neutrons and electrons in an atom?
Protons= atomic number Neutrons= mass number-atomic number Electrons= atomic number
What is the symbol thing for carbon dioxide?
CO2
What is the symbol thing for water?
H2O
What is the symbol thing for oxygen gas?
O2
What is the symbol thing for hyrdrogen gas?
H2
What is the symbol thing for nitrogen gas?
N2
What is the symbol thing for ammonia?
NH3
What is the symbol thing for hydrochloric acid?
HCl
What is the symbol thing for sulfuric acid?
H2SO4
How do you separate two liquids with different boiling points?
Distillation
How do you separate a mixture that consists of an insoluble solid and a liquid?
Filtration
How do you separate a mixture that consists of a soluble solid and a liquid?
Evaporation
How do you separate a mixture that consists of many different liquids with different boiling points?
Fractional distillation
What was the plumb pudding model?
Positive ‘cloud’ with negetive electrons dotted through it
Who disproved the plumb pudding model?
Rutherford
What did Rutherford discover?
The nucleus
What did Chadwick discover?
neutrons
What did Bohr discover?
The current model for an atom
What does the group that an element is in tell us?
The amount of electrons thar are in the outer shell
What does the period that an element is in tell us?
The amount of shells an atom has
Do metal ions gain or lose electrons?
Lose
Do non-metal ions gain or lose electrons?
Gain
How many electrons do group one elements gain/lose?
Lose one
How many electrons do group two elements gain/lose?
Lose two
How many electrons do group six elements gain/lose?
Gain two
How many electrons do group seven elements gain/lose?
Gain one
