A metal less reactive and another metal more reactive than hydrogen are (a) aluminium and lead (b) iron and magnesium
(c) copper and tin (d) copper and mercury
Fill in the blanks:
(a) Phosphorus is a very _________ non-metal.
(b) Metals are ________ conductors of heat and _________.
(c) Iron is ________ reactive than copper.
(d) Metals react with acids to produce _________ gas.