Top answers

State the trends in reactivity of the group 1 and group 7 elements and explain the reasons why.

Elements react by gaining or losing electrons. Elements wants to reach the stable state of having 8 electrons in the outermost ring, so group 1 elements react by losing an electron, since they have only 1 el...
LF
Answered by Lorne F. • Chemistry tutor
55768 Views

What are the differences between covalent bond and an ionic bond? And can you give an example of each?

A covalent bond is formed when two atoms each share one electron, an example of a molecule that has covalent bonding is methane or CH 4 . An ionic bond is where one (or more) atom donates an electron(s) to a...
RS
Answered by Rhona S. • Chemistry tutor
6298 Views

Does reactivity increase or decrease as you go down group 7?

Reactivity will decrease as you travel down group 7 in the periodic table. Group 7 elements need to gain an electron to become stable as they need 8 electrons in their outer shell. Group 7 elements only cont...
RW
Answered by Rebecca W. • Chemistry tutor
17568 Views

GCSE Chemistry- Describe the structure of an atom?

Atoms have a small nucleus surrounded by electrons. The Nucleus- It is in the middle of the atom It contains protons and electrons Protons are positively charged +1 Neutrons have no charge 0 Nucleus has a po...
UI
Answered by Umair I. • Chemistry tutor
3059 Views

How does sodium chloride (salt/grit) lower the freezing point of water?

Water is a highly ordered material. When something dissolves in water, some of these O-H bonds are broken. This requires heat energy. The water molecules can then form attractive interactions to solute ions ...
OO
8110 Views