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Chemistry
GCSE

What does the periodic table show you?

The periodic table arranges all the different elements into columns and rows, The horizontal rows are called periods, this is where the elements differ from left to right but the addition of an electro...

TM
Answered by Tom M. Chemistry tutor
7003 Views

What is an unsaturated hydrocarbon?

Unsaturated hydrocarbons contain at least one carbon carbon double bond, the simplest is the alkene. They are more reactive than saturated hydrocarbons because they have the ability to...

CA
Answered by Chloe A. Chemistry tutor
14475 Views

What is the difference between an Atom and an Ion?

An atom has the same number of protons and electrons so an atom has no overall electric charge.

If an atom loses or gains electrons it b...

PW
Answered by Phoebe W. Chemistry tutor
16745 Views

A metal oxide has a relative formula mass (Mr ) of 81. The formula of this metal oxide is MO. Given that the relative atomic mass (Ar ) of oxygen is 16, what is the metal in the metal oxide?

The formula of the metal oxide is MO, which means there is only one oxygen atom bonded to the metal. The Mr of a compound is the sum of Ar of the elements that make up the compound. So, from this we ca...

JT
Answered by Jack T. Chemistry tutor
34791 Views

Why are GORE-TEX type materials are waterproof and yet breathable?

The material is made up from nylon laminated with a PTFE / polyurethane membrane. The membrane is too fragile on its own hence why it is com...

LB
Answered by Lily B. Chemistry tutor
4044 Views

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