What is true of an atom's nucleus ? It is positively charged and takes up most of the atom's space .

It is positively charged and includes most of the atom's mass.

It is negatively charged and includes most of the atom's mass .

It is negatively charged and takes up most of the atom's space .

It is positively charged and includes most of the atom's mass.

Atoms are the basic units of matter and they are composed of a nucleus

and one or more electrons bound to the nucleus.The atomic nucleus is the small,

dense region at the center of an atom which consists of one or more protons and a similar number of neutrons.The protons are positively electric charged, the electrons have a negative electric charge, and the neutrons have no electric charge. Protons and neutrons are heavier than electrons and reside in the nucleus  and they are bound together to form a nucleus by the nuclear force.

More than 99.94% of an atom's mass is in the nucleus.

It is positively charged and takes up most of the atom’s space.

Explanation:

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.