Number 4. 1 and 2 are both wrong. Copper is a metal and sulfur is a nonmetal. And when a bond is made, energy is stored.
A) <span>Particles need to collide in order to react</span>
Explanation:
proton number and neutron number sums up to form the mass number
<span>Two scientists wrote a paper detailing their research and conclusions and submitted it to a scientific journal. Several months later, they received the paper back from the publisher with many comments attached from several fellow scientists. It is either that they revise their study or replicate the study. Most scientists would revisit their work and the findings they had from their research. Most probable if they were successful and the comments of the publisher and the co-scientists were positive they could replicate the study to validate its accountability.<span>
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