what is the valency of radium and uranium?

Respective sir / mam , I want a list of periodic table on the basis of the following categories-

1. Alkai metals

2. Altai Earth metals

3.Transition metals

4. Non - metals

5.poor - metals

6. Halogen

7. Noble gases

8. Actinides

9. Lanthanides

Please allocate this table ...........

_{what are elements and compounds}

How do you balance C₁₈H₃₈ + O₂ ----->  CO₂ + H₂O  ?

what is the valency of barium please answer!

 balancing equation of 

NO+O2-----------NO2

 what is acceleration due to gravity

 what is the difference between valencies and ions?

what is valency of gold?

why is it correct to write p4+5o2+2p2o5 and not 4p+5o2+2p2o5

What is homolytic bond fission?

I THINK HYDRIDE SHOULD HAVE VALENCY 1

I am confused that

IF SYMBOL OF SULPHIDE IS S THEN WHAT IS THE SYMBOL OF SULPHUR .

 What are examples of Displacement Reactions?

how water(h2o) is forned?