Get premium membership and access questions with answers, video lessons as well as revision papers.

The grid below shows a section of the periodic table, the letters are not the actual chemical symbol

      

The grid below shows a section of the periodic table, the letters are not the actual chemical symbol

grind13610112019.png

a) Name the family into which element P belongs to.

b) Which two elements forms the most soluble carbonates

c) With a reason, identify elements in period 3 with the largest atomic radius

d) Write the formula of the compound formed between Q and M

e) State two uses of element R and for each use , state property of element R that makes lts possible for the use
(i) Use
Property

(ii) Use
Property

f) Using dots and cross ,show bonding in the compound formed between R and oxygen.

g) In terms of structure and bonding explain why the oxides of element Thas relatively low boiling points

  

Answers


Martin
a) Noble gases
b) K and W
c) Q, it has lowest nuclear charge hence electrons in the energy level are least pulled towards the nucleus
d) Q3M2 or Mg3N2
e)
i. Used for making sufuria /cooking pan
Property – good conductor of heat
ii. Used for making overhead cables
Property – not easily corroded / good conductor of electricity (penalize electrical cables)

f)atom14210112019.png


g) It has molecular structure with weak van der waals forces of attraction between the molecules which require little energy to break

marto answered the question on October 11, 2019 at 10:43


Next: Given a mixture of lead (II) oxide, ammonium chloride and sodium chloride, describe how this mixture can be separated to obtain a sample of each.
Previous: The setup below was used to separate two miscible liquids Q and T (Boling points; Q =98° C, T=78°C)

View More Chemistry Questions and Answers | Return to Questions Index


Learn High School English on YouTube

Related Questions