For which of the following reasons does a chloride ion have a negative charge?
It gained an electron.
It lost an electron.
It lost a proton.
It gained a proton.
The Correct Answer is A
A chloride ion has a negative charge because it gained an electron. When an atom gains an electron, it becomes negatively charged because it now has more electrons than protons. In the case of a chloride ion, the neutral chlorine atom gains an electron to become a negatively charged chloride ion.
The other options are not correct because they do not result in a negative charge. Losing an electron would result in a positive charge. Losing or gaining a proton would change the identity of the atom and is not related to the formation of a chloride ion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
The statement that best supports the grant proposal is a. Repeating the published work will provide independent confirmation of the results. Independent confirmation of results is an important part of the scientific process. By repeating an experiment that was recently published by another researcher, the researcher writing the grant proposal can provide additional evidence to support or refute the original findings.
B. Repeating published work with changed variables will extend the previous results, but this is not the main goal of repeating an experiment.
C. Funding this important research will benefit science in the long term is a general statement that does not specifically support the grant proposal to repeat an experiment.
D. Funding this grant proposal will allow this laboratory to continue to study this topic is also a general statement that does not specifically support the grant proposal to repeat an experiment.
Correct Answer is B
Explanation
A change that takes place as a solid turns to a liquid is that particles become less ordered. When a solid is heated, its particles gain energy and begin to vibrate more rapidly. As the temperature increases, the particles gain enough energy to overcome the forces holding them in place and begin to move more freely.This results in a loss of order as the solid melts and becomes a liquid.
The other options are not correct because they do not accurately describe a change that takes place as a solid turns to a liquid. Particles do not have a decrease in mobility, move closer together, or experience stronger intermolecular forces between them as a solid turns to a liquid.
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