According to Rutherford’s Model of an atom:

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The space surrounding the nucleus known as the extra-nuclear part is negatively charged so an atom is neutral

The entire mass and positive charge are concentrated in a very small region at the centre known as the nucleus

All of these

Atom is spherical and consists of a nucleus and an extra-nucleus part\

answer is D.

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Detailed Solution

According to the Rutherford atomic model, an atom's positive charge and the majority of its mass are concentrated in an extremely small volume. He referred to this region of the atom as the nucleus. According to Rutherford's model, negatively charged electrons surround an atom's nucleus. The model depicted the atom as a tiny, dense, positively charged core called a nucleus, in which nearly all of the mass is concentrated, and around which the light, negative constituents known as electrons circulate at some distance, similar to planets revolving around the Sun.

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