Chemistry help need Urgent?

Posted on 2016-04-13 18:43:00 in Chemistry by DANI

Have a small chemistry quiz and need urgent help on the following questions: 
Question 1: Diffusion rates in gases and liquids are significantly greater than those in solid materials because: 
a) Bose-Einstein condensates closely model their energy b) their bonds are closely covalant. c) they are more free to move d) diffusion is thermodynamic constant 
Question 2: Fill in the missing: Covaent, ionic and metalic bonds are also known as ______ bonds, while Van der Waals are also known as ______ bonds. 
Question 3: By which method of producing composite materials would you expect plywood to be made? 
a) Injection moulding b) isostatic pressing c) Pressed layers d) 3D Printing 
Question 4: from the following statments the periodic table of the elements, choose all those that are true. 
a) The alkaline earths and alkali metals occupy the extreme right columns b) the non-metals occupy the extreme right columns c) All the elements in a single column have similarities while often differing markedly from elements in other columns. d)The soft metals fall between the transition metals and non metals e) the rows have traditionally been labeled using roman numerals f) Most of the traditional engineering metals are comperatively soft and unreactive with low melting points. 
Question 5:fill in the following ______ ______ is the category of mateials plywood woud best fit.

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