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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.

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(a) Phosphorus is a very reactive non-metal. 

(b) Metals are good conductors of heat and electricity. 

(c) Iron is more reactive than copper. 

(d) Metals react with acids to produce hydrogen gas.

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