What is an ion? a. a group of two or more atoms that acts like one atom b. a compound that contains two elements c. a particle in the nucleus of an atom that has no charge d. an atom or particle with a positive or negative charge

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.