Other pages in this set

Page 2

Preview of page 2

Here's a taster:

Table of Contents
C4: Chemical Patterns
A: The periodic table
B: The alkali metals
C: Chemical equations
D: The halogens
E: The discovery of helium
F: Atomic structure
G: Electrons in atoms
H: Electronic structures and the periodic table
I: Salts
J: Ionic theory
K: Ionic theory & atomic structure
L: Chemical species
C5: Chemicals of the natural environment
A: Chemicals in the four spheres
B: Chemicals in the atmosphere
C: Chemicals of the hydrosphere
D: Chemicals of the lithosphere…read more

Page 3

Preview of page 3

Here's a taster:

E: Chemicals of the biosphere
F: Human impacts on the environment
G: Metals from the lithosphere
H: Structure and bonding in metals
I: The life cycle of metals
C6: Chemical synthesis
A: The chemical industry
B: Acids and alkalis
C: Salts from acids
D: Salts in our lives
E: Purity of chemicals
F: Rates of reaction
G: Chemical quantities
H: Stages in chemical synthesis…read more

Page 4

Preview of page 4

Here's a taster:

C4: Chemical
A: The periodic table
Relative atomic masses are the masses of atoms in comparison to the lightest
atom, hydrogen, on a scale where hydrogen is 1.
Groups of three are groups of atoms with similar properties, where the relative atomic
mass of the middle element is the mean of the relative atomic masses of the other
two elements, for example calcium, strontium and barium is a group of three.
A periodic pattern is a repeating pattern.…read more

Page 5

Preview of page 5

Here's a taster:

B: The alkali metals
The alkali metals are reactive metals found in group one of the periodic table
that react with water to form alkaline solutions.…read more

Page 6

Preview of page 6

Here's a taster:

C: Chemical equations
During a chemical change, there is no change in mass.
In chemical equations, the number of atoms of each element has to be the
same on each side of the arrow.
To write an equation, you need to know:
o The reactants, or starting chemicals
o The products
o The formulae of the reactants and products
Most nonmetals are molecular (O2, H
2), whereas all metals are nonmolecular (C, Si).…read more

Page 7

Preview of page 7

Here's a taster:

D: The halogens
The halogens are very reactive nonmetals found in group 7 of the periodic table.
Halogen means salt former, and the halogen elements form salts when they react
with metals.
The halogens are molecular, and normally come in pairs (Cl2, Br
2, I
Low melting and boiling points because of weak forces between the molecules.
The halogens can harm living things and kill bacteria, for example chlorine in bleach.…read more

Page 8

Preview of page 8

Here's a taster:

E: The discovery of helium
Bunsen invented the Bunsen burner that is still used in labs today.
He realized different chemicals produced different flame colours.
Spectroscopy was used to record the line spectra of elements.
Janssen and Lockyer discovered helium when they were studying the line spectra of
the elements in the Sun during an eclipse.
F: Atomic structure
Dalton's atomic theory is the theory that atoms are indivisible.
The nucleus of an atom consists of protons and neutrons.…read more

Page 9

Preview of page 9

Here's a taster:

The closer to the nucleus a shell is, the more energy is needed to remove the
electrons.…read more

Page 10

Preview of page 10

Here's a taster:

H: Electronic structures and the
periodic table
Periodic tables show the atoms in order of proton number instead of R.A.M.
Periods show the filling of each shell with electrons.
Groups have the same number of electrons in their outer shell, which gives them
similar properties.
Elements with one or two electrons in the outer shell are metals.
Elements with more than two electrons in the outer shell are generally nonmetals.
Noble gases are very unreactive because they have a full outer shell.…read more


No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all resources »