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Worksheetsch12 Metals (#1)
Total questions: 10
Worksheet time: 7mins
Which of the following are properties of metals? [hint: 2 answers]
malleable and ductile
bad conductor of electricity
low melting point
good conductor of heat
Explain why metals are good conductor of electricity?
It can be bent and stretched
due to free moving valence electrons
strong metallic bond
it is shiny
This is the structure of alloys.
TRUE
FALSE
What is an alloy?
substance that cannot be broken down into simpler substance
mixture of a metal with another element
the simplest substance existed
it is a compound
Which of the following is an alloy?
Aluminium
Brass
Air
Sodium chloride
Which of the following alloy is made up of copper and tin?
bronze
brass
stainless steel
pewter
Why is alloy hard and strong?
due to strong metallic bond between the elements
atoms are regularly arranged and can act as lubricant
it is made up of mixture of metals
due to mismatched size of atoms and these atoms cant slide past each other
Which of the following is the least reactive metal?
sodium
tin
aluminium
copper
What will be the products when reactive metals react with water?
metal hydroxide and hydrogen gas
metal oxide and carbon dioxide
salt only
hydrogen gas only
What will be observed when sodium is added to water?
no reaction
reacts violently, small explosion can be seen
reacts very slowly, few bubbles
