Which of the following has a positive or negative charge? a. covalent bond b. hydrogen bond c. ionic bond d. molecule

.The answer to this question is: C. ionic bond
In general, Ion particle are formed when atoms lose or gain electron (when loses electron, ion become positive. When gaining it, ions become negatively charged)
Among the chemical substances,  Metal atoms had the positive ions and nonmetal atoms will have negative ions

Some of their responsibilities are to evaluate safety, efficiency, and effectiveness of the biomedical equipment. train people on how to properly operate biomedical equipment. lastly is to research the engineering aspects of the biological systems of humans and animals.

His goal is  achievable, realistic, measurable, and time-based. : )