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Why do certain metals give off different colours when heated?

This is to do with the electrons in the metal atoms. When a piece of the metal is heated, if there is enough energy supplied to the atoms, their electrons are excited and are promoted (jump up) to higher ...

Answered by Josh R. • Chemistry tutor

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How can you determine the shape of water?

Water consists of two hydrogen atoms covalently bonded to an oxygen atom, the atoms oxygen has 6 outer shell electrons, and wach hydrogen donates one, this results in the structure having 8 electrons, mea...

Answered by JOSHUA M. • Chemistry tutor

2215 Views

What are the oxidation numbers of each element in these examples: a) H2SO4 b) N2 c) NH4+

a) H₂SO₄ANSWER: H: +1 S: +6 O: -2 b) N₂ANSWER: N: 0 (all elements not within a compound have an oxidation number of 0 eg I₂, O₂, K) c) NH₄

Answered by Georgia B. • Chemistry tutor

2291 Views

What is equilibrium in regards to chemical reactions?

A + B -----> AB In the chemical reaction above, reactant A reacts with reactant B to form product AB. However, it is a common misconception that this reaction only goes in the forward direction (which ...

Answered by Beatrice H. • Chemistry tutor

2985 Views