WILL GIVE OUT Which atom would be neutral?

1. An oxygen atom with 16 electrons, 18 protons, and 16 neutrons

2. An oxygen atom with 4 electrons, 6protons, and 4 neutrons

3. An oxygen atom with 8 electrons, 8 protons, and 9 neutrons

4. An oxygen atom with 9 electrons, 8 protons, and 8 neutrons

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

Drug abuse will not lead to physical and psychological dependence. true or false ?

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.