Sodium (Na) has 11 protons and 12 neutrons. What is its isotope notation?

A. Na-11

O B. Na-12

C. Na-23

D. Na-34

It takes energy to ionize any atom. It takes progressively more and more energy for each successive electron that is removed and the increase is somewhat smooth.

Why are noble gases considered to be non-reactive

What is the pH of a solution with a [H+] of 1.0 x 10-4 M? a. 4.0 b. 8.0 c. 3.0 d. 2.0

Which of these methods could be used to separate an insoluble solid from a soluble solid? Melting the mixture and then using a filter to separate out the soluble solid Melting the mixture, mixing it with water, and then using a magnet to separate

A particular type of rock formation is known to have a porosity of 22%. How much fluid could be present in 50 L of this rock?

What is atomic and mass number

You mix 55 ml of 1.00 m silver nitrate with 25 ml of 1.06 m sodium chloride. what mass of silver chloride should you form?

Consider the compounds 4-tert-butylcyclohexanol and 4-tert-butylcyclohexanone. using silica gel plates, which of the two compounds will have the higher rf value when ethyl acetate is the developing solvent?

Which model of election configuration is the most accurate? The quantum mechanical atomic model The Rutherford atomic model The Bohr atomic model O Plum pudding atomic model The quantum gravity atomic model

How is the rate of appearance of h2o related to the rate of disappearance of o2?