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Chemistry
GCSE

What is the value of 'a' when '4a-b=38' and 'b' has the value of '2'?

Firstly, we write down all the information we are given from the question into mathematical form.

This equation is 4a-b=38                                        The valu...

AR
Answered by Aniqah R. Chemistry tutor
7857 Views

Explain how the structure of metals allow them to form metallic bonds.

A giant metallic lattice – the crystal lattice of metals consists of regularly arranged  ions (NOT atoms) surrounded by a ' delocalised sea of electrons' that form the giant lattice. 

The...

KD
28986 Views

What is the difference between covalent compounds and ionic compounds?

Covalent compounds contain atoms that share electrons - for example, hydrogen chloride (HCl) share electrons (one from each atom), in order to achieve a full set of 8 electrons in their outer ...

BS
Answered by Beth S. Chemistry tutor
7797 Views

Describe the difference between a covalent and an ionic bond. Give examples.

A covalent bond is formed due to a shared pair of electrons between to atoms. It occurs between two non-metal atoms eg) HClAn ionic bond is formed when there is a strong electrostatic attraction between o...

HC
Answered by Hannah C. Chemistry tutor
3941 Views

Explain what is meant by thermal decomposition

A reaction in which a substance is broken down into 2 or more substances by heat. An example is the breakdown of calcium carbonate into carbon dioxide and calcium oxide.

...

LC
Answered by Laura C. Chemistry tutor
17436 Views

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