Write the answers according to class 7 standard
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1.Fundamental particles make up and operate everything in our universe.
The key characteristic of fundamental particles is that they have no internal structure. In other words, they are not made up of anything else. There are two types of fundamental particles: Particles that make up all matter, called fermions.
2.Low melting points and boiling points. ...
Low enthalpies of fusion and vaporization These properties are usually one or two orders of magnitude smaller than they are for ionic compounds.
Soft or brittle solid forms. ...
Poor electrical and thermal conductivity.
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