C5 - Chemicals of nature

What is the oceans and rivers sphere called?

What is the earth sphere called?

What is the air sphere?

All molecules have a tendency to stick together, so why do O2 molecules not combine?

What is a covalent bond?

In what atoms do covalent bonds occur?

Describe the covalent bond.

What is electrostatic attraction?

What are the four special properties of water?

Why does the structure of the atoms in a water molecule cause its properties?

What is happening when a precipitate forms?

What is an iconic equation?

What test is used to identify metal ions in a precipitate?

How do they found out what a non-metal precipitate is?

What are the two most common elements in the lithosphere?

What is an ionic compound?

What is ionic bonding?

What is the structure of solid ionic compounds?

Why do ionic compounds only conduct electricity when molten or dissolved in water?

What are the five properties that are the same for graphite and diamond?

What three properties of diamond are different from those of graphite?

Describe the structure of diamond.

Describe the structure of graphite.

What are ores?

What are the four questions asked by a scientist when a company is considering digging up a new ore site?

How is impure zinc (ZnS) refined into pure zinc (Zn)?

How is the relative formula mass of a compound calculated?

You have Fe2O3 - Fe is 56 and O is 16. Calculate the relative formula mass.

When does electrolysis often take place?

What is electrolysis?

Draw (or mentally picture) an unlabelled diagram of electrolysis.

How does electrolysis work?

What happens to the ions during electrolysis and why?

What is the bonding between metals called?

What are the four properties of metallic bonding?

Describe the structure of a metallic bond.

What are the two negative and two positive factors to consider in mining?