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(c ) Which two properties of metals enable us to give the desired shapes to metals ? A study out of the Harare Institute of Technology also listed that printed circuit boards contain, “about 20 wt% copper, 0.04 wt% gold, 0.15 wt% silver, and 0.01 wt% palladium,” with wt% representing percentage by weight.A chart in the study from the Proceedings of the International Conference on Sustainable Solid Waste Management also listed the presence of precious metals in … Madhya Pradesh School Reopen from Dec 18 for classes 10 and 12. The following are the physical properties of metal : The physical properties make them useful for many purposes. Q10. Only bromine exists as a liquid at room temperature. Bihar schools to reopen for class 9 and above from January 4th, 2021. An example of a solid that is a nonmetal is sulfur. 17 non metals out of which 11 in gases state (H,N, O, F, Cl,He, Ne, Ar, Kr, Xe,Rn), 01 in liquid state (bromine), 05 no in solid state (C, S, Se, P, & I), Metalloid (B, Si,Ge,As,Sb,Te,Po, & At). Expressions and Identities, Direct • Metals are good conductors of electricity and heat while nonmetals are poor in that. Maths. List in tabular form any three chemical on the basis of which metals and non-metals are differentiated. However, Diamond is an exception as it is the hardest non-metal. One non-metal, bromine, is a liquid at room temperature. A list of ferrous metals contains iron and its alloys, including all steels. This means that they will break when we try to bend them with enough force. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Some non-metals are in solid state, a few others are in liquid state and the rest are in gaseous state at room temperature. All of the alkaline earth metal atoms have a +2 oxidation state. 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