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Science, 16.01.2021 13:55 smith21

8. How are elements classified? A. Elements are all metals.
B. Elements are all non-metals.
C. It is classified into metals and non-metals only
D. It is classified into metals, metalloids and non-metals
9. How are physical properties of elements observed?
A. It is observed by looking at the chemical changes.
B. It is by examining a sample of the pure element.
C. It is by looking at the physical changes.
D. It is by looking at the physical and chemical changes of the element
10. Why is Aluminium used in the production of industrial materials?
A. It is lightweight and durable.
B. It can combine with other elements.
C. It is used in torches for welding.
D. It can yield very high temperatures.
11. One of the important elements in the human body is Sodium. Why is Sodium important
in the human body?
A. It provides the human body with energy
B. It plays a crucial role in protecting the body and preserving joints
C. It is the most important constituent of animal cells.
It is useful in transmitting nene cia

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8. How are elements classified? A. Elements are all metals.
B. Elements are all non-metals.
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