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Chemistry
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How does covalent bonding work?

Covalent bonding relies on the fact that all atoms are desperately trying to get a full outer shell of electrons. By full outer shell we mean 2 electrons in the first shell, 8 in the 2nd shell, 8 in th...

SA
Answered by Sabrina A. Chemistry tutor
4973 Views

How does the reactivity of group 2 elements change down the group, and what is the cause of this trend?

Each row on the periodic table represents a new energy level/electron shell. So as you go down the group there are more energy levels, increasing the atomic radius. The first electron to react will be ...

RR
Answered by Ruth R. Chemistry tutor
49292 Views

Calculate the atom economy for making hydrogen when zinc is reacted with HCL?

So, there are two parts to this question. 

Firstly, you need to decode the words in the question and transform this into an equation. 

From chemical knowledge, you know: aci...

PD
Answered by Pooja D. Chemistry tutor
17114 Views

Why does reactivity increase as you go down Group 1 metals?

An atom is made in such a way that the nucleus with the positive charges (protons) is in the centre and the negative charge (electrons) are arranged in shells around it.

All group 1 metal...

MP
150093 Views

Explain why average bond enthalpies can be used for cyclohexane but not for benzene

Benzene has a resonance structure while cyclohexane consists of only single bonds of the same length. Benzene's resonance structure means it has intermediate bond lengths and strengths. This means aver...

CM
Answered by Chloe M. Chemistry tutor
4083 Views

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