Question

Arrange in decreasing order of reactivity:
Sodium, copper, magnesium, iron, silver, platinum

Answer 1

You can use this to remember reactivity series,

Please. Potassium

Stop. Sodium

Calling. Calcium

Me. Magnesium

A. Aluminium

Zebra. Zinc

In. Iron

Library. Lead

Hi. [Hydrogen]

Call. Copper

Me. Mercury

Something. Silver

Good. Gold

Please. Platinum

This is in decreasing manner as we go down.

So,by this

Sodium, Magnesium,Iron,Copper,Silver,

Platinum