Read the water level with the correct number of significant figures.

What species is represented by the following information? p+ = 12 n° = 14 e- = 10

One element that has 5 valence electrons is ________.   

Give the ground state electron configuration for Mg2⁺.   

Compounds are pure substances that by definition consist of ________.

  The correct symbol for a uranium atom with a mass number of 235 is ________.

Calculate the energy of the orange light emitted, per photon, by a neon sign with a frequency of 4.89 × 1014 Hz. (E = h ν,Value of Planck’s constant h = 6.626 x 10-34 J.s and velocity of light c = 3.00 x 108 m/s) 

Which of the following is NOT true for the atoms 13N, 14N, and 15N?

Which reaction below represents the Ionization energy of Li?

Which of the following is the fundamental SI unit of mass?