Metalloids refer to those class of material which possess properties of both the metals and non-metals. Examples of such materials are silicon, germanium etc. They possess fair conductivity of electricity or heat and are brittle in nature etc.
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Explain the following statements:
i. Most metal oxides are insoluble in water but some of these dissolve in water. What are these oxides and their solutions in water called?
ii. At ordinary temperature, the surface of metals such as magnesium, aluminium and zinc, etc. is covered with a then layer. What is the composition of this layer? State its importance.
iii. Some alkali metals can be cut with a knife.Xam idea - Science
Why sodium chloride has high melting point?All In One Science
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(iv) KNCERT - Science Exemplar
Which of the following metals exist in their native state in nature?
(iv) AgNCERT - Science Exemplar
Stainless steel is very useful material for our life. In stainless steel, iron is mixed withNCERT - Science Exemplar