C4/C5 Revision puzzle (medium-difficult)

Across2. The colour of the flame produced when sodium burns (6)6. The method of extraction of aluminium from its' ore (12)8. Ionic bonding is an _____________ attraction between positive and negative ions (13)11. The state in which ionic compounds cannot conduct electricity (5)13. The name of a waste product from the blast furnace (4)14. A column in the Periodic Table is called a _______ (5)16. Can be described as the loss of electrons (9)17. An element present in proteins but not in carbohydrates (8)19. The gas produced when sodium reacts with water (8)

Down1. The bonding in sodium chloride (5)3. In covalent bonding the __________ are shared between the atoms in the bond (9)4. Can be described as the gain of electrons (9)5. A row in the Periodic Table is called a _______ (5)7. The bonding in sodium is ___________ (8)9. The ________ metals is the common name for Group 1 (6)10. The name given to regular repeating 3D bonding structures (5)12. Bauxite (Al2O3) is an _______ ore of aluminium15. The element used to extract iron from its' ore (6)18. The scientific name for a solid which has been melted (6)

19. The __________ is the common name for Group 7 (8)Extraction of aluminium

Aluminium is found as an ______ ore called _________. Aluminium

is extracted using a process called ____________. This uses

_____________ to split the ore into its’ component parts. For the

process to work the ore has to be ________ so the ions are free to

move. Aluminium is in Group __ of the Periodic Table so exists as

____ ions, oxygen is in Group __ so exists as ____ ions. The

aluminium ions are attracted to the ________ electrode, when they

get there they _____ electrons to make neutral aluminium metal.

The oxygen ions are attracted to the _______ electrode, when they

get there they ____ electrons and combine together to make oxygen

gas. The equations for the process are –

Al3+ + ____ Al 2O2- O2 + ___

The main disadvantage of _________ is that it requires a lot of

_______ in the form of ____________ both to keep the ore

________ and to carry out the process.

Modules C4 and C5 Revision

Fill in the missing words……..

Atoms are made of _______ fundamental particles called protons (+),

_________ (0) and _________ (-). The centre of the atom is called

the ___________. It consists of protons and ___________ and

contains most of the mass of the atom. The number of protons in the

atom is called the ________ number. It also equals the number of

_________ in an element (not the case for an ____). The _____

___________ is the sum of the protons and neutrons in the nucleus.

An atom of mass number 43, and atomic number 21,

consists of ___ protons, ___ neutrons and ____

electrons. In the symbol for an atom of ______ shown on

the left, the atom consists of ___ protons, ___ neutrons and ___

electrons. Atoms of the same element with a different _____

number due to different numbers of neutrons are called

____________.