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Subjects
Science State Board
Class 10
Periodic Classifications of elements
Introduction to Metallurgy
15.
Exceptional metals
Exercise condition:
5
m.
Choose that exceptional metal:
1.
Metals are tough and durable (exceptions: __________ can be cut with a knife)
rubidium
potassium
iron
lithium
2.
Metals have high melting and boiling points, and they only evaporate at high temperatures. (exceptions: __________).
sodium and potassium
rubidium and potassium
silver and potassium
sodium and rubidium
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