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Chemistry
GCSE

Explain the trends in electronegativity in the periodic table

As you go across the period from left to right (excluding noble gases), electronegativity increases. This is because the nuclear charge increases (Atomic Number/number of protons) and atomic radius decrea...

Answered by Anika P. Chemistry tutor
2570 Views

What is the First Law of Thermodynamics?

The First Law of Thermodynamics is that energy cannot be created or destroyed, it can only change from one form to another. For example, a boulder perched at the top of a hill has gravitational potential ...

Answered by Jade D. Chemistry tutor
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What is a covalent bond?

A covalent bond is when the nuclei of two different atoms share a bonded pair of electrons.

Answered by Christine M. Chemistry tutor
1449 Views

What is the difference between percentage yield and atom economy?

Percentage yield is an experimental value calculated based on obtained results whereas atom economy is a theoretical value measured according to a balanced equation. Percentage yield shows the efficiency ...

Answered by Akriti G. Chemistry tutor
11550 Views

Name and describe the type of bond in sodium chloride

Sodium chloride contains ionic bonds between sodium and chloride ions.Sodium has one electron in its outer shell, whereas chlorine has 7. Atoms are happiest when they have a full outer shell of electrons....

Answered by Emily H. Chemistry tutor
11688 Views

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