Q20 of 52 Page 38

Three elements B, Si and Ge are

Boron (B), silicon (Si), germanium (Ge) are metalloids. A few others are arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At). These elements are found between metals and non-metals of the periodic table. They have properties of both metals and non-metals.

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18

Arrange the following elements in the order of their increasing nonmetallic character: Li, O, C, Be, F

 19

What type of oxide would Eka–aluminium form?

 21

Which of the following elements will form an acidic oxide?

 22

The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?