Ions and Formulas

Question 1

Atoms which have lost or gained an electron(s) are …

Answer 1

IONS

Question 2

Ions have the electrostatic structure of a …

Answer 2

Noble gas

Question 3

Which groups of elements are most likely to form ions?

Answer 3

Group 1, 2, 6 and 7.

Question 4

> Group 1 and Group 2 are …

>They …

Answer 4

> Metals

>Lose electrons to form positive ions

Question 5

> Group 1 elements are what metals?

>They form? with?

Answer 5

> ALKALI METALS
Ionic compounds with NON-METALS where the metal ion has a 1+ charge
Eg) K+ Cl-

Question 6

> Group 6 and Group 7 are …

>They …

Answer 6

> Non metals

>Gain electrons to form negative ions.

Question 7

> Group 7 are what ?

>They form?

Answer 7

> Halogens (Non-Metals)
Ionic compounds with ALKALI METALS where the halide ion has a 1- charge.
Eg) Na+ Cl-

Question 8

REMEMBER!!!!

THE CHARGE ON THE POSITIVE ION IS THE SAME AS …

Answer 8

THE GROUP NUMBER OF THE ELEMENT. 
Eg) Group 1 has 1+
Group 2 has 2+
Group 6 has 2-
Group 7 has 1-

Question 9

Looking at charges to work out the formula of an IONIC COMPOUND…

Answer 9

Sodium Chlordie contains Na+ (+1) and Cl- (-1)
Charges balance eachother as both the same.
Therefore formula = NaCl

Magnesium Chloride contain Mg2+ (+2) and Cl- (-1)
Chloride = -1. Needs 2 to balance 2+ of magnesium.
Therefore formula = MgCl2