Metal, is any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light.The most abundant varieties in the Earth's crust are aluminium, iron, calcium, sodium, potassium, and magnesium’ The vast majority of metals are found in ores (mineral-bearing substances), but a few such as copper, gold, platinum, and silver frequently occur in the free state because they do not readily react with other elements.
1. What is the class of substances characterized by high electrical and thermal conductivity ?
a. Metals
b. Non-Metals
2. What are properties of metals?
a. Malleability
b. Ductility
c. High reflectivity of light
d. All of the above.
3. The vast majority of metals are found in _____.
a. Earth's crust
b. Ores
c. Sea
4. The most abundunt varities of material in Earth's crust are______,______etc
a. Aluminium
b. Iron
c. Gold
d. Both A and B
5. True or False. Metals are not ductile.
a. TRUE
b. FALSE
