The nucleus of an atom has all of the following characteristics except that it
select one:
a
is positively charged.
b
is very dense.
c
contains nearly all of the atoms mass.
d
contains nearly all of the atoms volume.

The nucleus of an atom has all of the following characteristics except D. contains nearly all of the atoms volume.

A nucleus refers to the positively charged center of an atom. The nucleus also contains most of the mass of the atom. It is also dense.

The nucleus is composed of protons and neutrons. The protons have a positive charge and the neutron has no charge.

It should be noted that the nucleus of an atom doesn't contain nearly all of atoms' volume.

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d. contains nearly all of the atoms volume.

Explanation:

An atom is the smallest entity of a substance which consists of three subatomic particles called as neutrons, protons and electrons.

The most of the mass of the atom is concentrated in the centre of an atom and is called as nucleus. Protons and neutrons are collectively called as nucleons as they are present in the nucleus and contribute to the mass of the nucleus. Nucleus is very dense as it occupies very less space and most of the space in the atom is empty.

Protons carry positive charge and neutrons does not carry any charge. Thus the nucleus is positively charged.

Electrons carry negative charge and revolve around the nucleus in fixed energy paths called as orbitals.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.