If a sodium ion has 11 protons, 12 neutrons, and 11 electrons, what is the atomic mass of the atom?

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?

How many peaks will be present in a mass spectrum for brcl?