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Reactivity increases down the group. The number of electron shells increases down the group. Therefore the outer electron is further away from the nucleus. Consequently, the attraction between the outer elec...

Copper ions are positively charged. So they are attracted to the negative electrode. The negative electrode is called cathode.At the cathode, each copper ion gains two electrons. They are said to be reduced ...

Bonding is when two atoms join together; this happens through movements of electrons to help create a full outer shell of electrons. Ionic bonding is when this takes place between a metal and non metal atom....

The reaction is as follows: 2H 2 + O 2 -> 2H 2 O This means that for every 2 molecules of Hydrogen gas, one molecule of Oxygen is needed to make 2 molecules of water To calculate the enthalpy of this reac...

I would first get the student to find the elements on the Periodic Table, and work out how many valence electrons each atom had. Then I would get them to draw the structures of hydrogen and chlorine using th...