Which statement accurately describes the atoms of a specific element? 1. A palladium, Pd, atom contains 46 electrons outside the nucleus and 45 neutrons inside the nucleus.
2. An antimony, Sb, atom contains 51 protons inside the nucleus and 51 electrons outside the nucleus.
3. An iridium, Ir, atom contains 77 protons inside the nucleus and 115 neutrons outside the nucleus.
4. A mercury, Hg, atom contains 80 electrons and 80 protons inside the nucleus.

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.

In a copper wire, a temperature increase is the result of which of the following

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves