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Chemistry
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Explain why the reactivity of Group 2 elements increases down the group.

Moving down Group 2, the atomic radius increases as there are more electron shells. This also means that the outermost electrons are more shielded from the positive charge of the nucleus. This decreases t...

Answered by Joe C. Chemistry tutor
5266 Views

Explain the trend in reactivity of the elements in Group 7.

The Halogens decrease in reactivity as you descend through the group. The atoms increase in size and Mr as you go down the group. Therefore their outer electrons are further away from the positive charge ...

Answered by Kirsten S. Chemistry tutor
5383 Views

In terms of electrons, what happens when magnesium atoms react with oxygen atoms to produce magnesium oxide?

Magnesium loses two electrons which are transferred to the oxygen atom (so oxygen gains two electrons). In this way, both magnesium and oxygen will acheive a stable full outer shell of electrons. The elec...

Answered by Reka K. Chemistry tutor
10920 Views

What is an isotope?

Atoms of the same element with different numbers of neutrons 

Answered by Bella S. Chemistry tutor
1720 Views

How many moles are in 6g of carbon?

moles = mass/mrn = 6/12n= 0.5

Answered by Lucy O. Chemistry tutor
5458 Views

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