C1 — Atomic Structure And The Periodic Table Flashcards
(29 cards)
What do atoms contain
Protons, neutrons and electrons
What is the charge and mass of a proton
Relative mass = 1
Charge = +1
What is the charge and mass of a neutron
Relative mass = 1
Charge = 0
What is the charge and mass of an electron
Relative mass = 0
Charge = -1
What does the number of protons equal
The number of electrons
What do the atomic number and mass number describe
An atom
What do elements consist of
Atoms with the same atomic number
What can atoms be represented by
Symbols
How are isotopes different to atoms
The have extra neutrons
What do atoms join together to make
Compounds
What does a formula show
What atoms are in a compound
How are chemical changes shown
Using chemical equations
What do symbol equations show
Atoms on both sides
What do symbol equations need to be
Balanced
What does filtration do
Separates insoluble solids from liquids
What are the two ways to separate soluble solids from solutions
Evaporation and crystallisation
What can filtration and crystallisation be used to separate
Rock salt
What is simple distillation use for
To separate out solutions
What is fractional distillation used for
To separate a mixture of liquids
How many electrons are allowed in the first shell
2
How many electrons are allowed in the second shell
8
How many electrons are allowed in the third shell
8
What are the features of group one elements
Reactive soft metals
What do alkali metals form ionic compounds with
Non metals
