Question

1 in atom the electron revolves around the nucleus in stationary circular path called
---------------
2 The force between the protons and neutrons the nucleus are of special kind called ---------force
3 The explanation of sem is---------
4 element having completely filled outermost shell –------- valency
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Answer 1

Answer:

orbit

The nuclear force

A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons. ... The electron beam is scanned in a raster scan pattern, and the position of the beam is combined with the intensity of the detected signal to produce an image.

All three are noble gas elements which have completely filled outermost shell. Helium and Argon is a noble gas, hence they have filled outermost shell.

Explanation:

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Answer 2

Answer:

1) Orbits or Energy shells

2) Nuclear Force

3) A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons. ... The electron beam is scanned in a raster scan pattern, and the position of the beam is combined with the intensity of the detected signal to produce an image.

4) Noble gases {Helium and Argon}

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