c3

Question 1

what is ionic bonding

Answer 1

chemical bond that occurs when a metal and non-metal atom transfer electrons to form oppositely charged ions that are then attracted to each other:

Question 2

how are ionic compounds held together

Answer 2

-held together in a giant lattice
- electrostatic reaction between the positive and negative ions holds the structure together

Question 3

state properties of ionic compounds

Answer 3

-high melting point and low boiling points(strong electrostatic forced between charged ions)

-do not conduct electricity when solid(ions in fixed position)

-conduct when molten or dissolved in water- ions are free to move.

Question 4

2 examples of positive ions and negative ions

Answer 4

Na+ Mg2+ Rb+

Cl- Br_

-ionic compounds are electrically neutral - positive and negative charges balance each other out.

Question 5

how are ionic compounds formed e.g. MgO

Answer 5

-reaction of non metal with metal
-electron transfer occurs- metal gives away its —–outer shell electrons to the non - metal
- mg is in group 2 so it can share 2 electrons
-0 is in group 5 so can accept 2 electrons to gain a full outer shell configuration
- mg becomes Mg2+ and 0 becomes O2-