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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...

Answered by Aniqah R. Chemistry tutor
7200 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...

Answered by Karishma D. Chemistry tutor
24633 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 ...

Answered by Beth S. Chemistry tutor
6803 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...

Answered by Hannah C. Chemistry tutor
3315 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.

...

Answered by Laura C. Chemistry tutor
16155 Views

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