How do you know the reactivity of metals with chlorine decreases from top to bottom?

How do you know the valence of a metal?

How do you know the valence of a non-metal?

How do you know the percolation rate of soil?

How do you extract highly reactive metals?

Write any two properties which are decreased from top to bottom in a group ?

How do you extract moderately reactive metals?

How do we know that we need food ?

How do you prove that a more reactive metal can replace a less reactive metal from its salt? Perform an activity and write (record) your observations.

How do various metals in activity series react with chlorine on heating?

How do you account for the formation of ethane during chlorination of methane?