How many protons and electrons do each of the following ions…

How many protons and electrons do each of the following ions have?                                    Protons                                Electrons N3-  [fay1]     [fay2] Ba2+  [fay3]     [fay4] Br-  [fay5]     [fay6] Al3+  [fay7]     [fay8]

An isotope has a mass number of 72 and an atomic number of 3…

An isotope has a mass number of 72 and an atomic number of 34. How many neutrons are in each atom of the isotope?  [red4] How many electrons are in each atom?  [red5] If the isotope gained 2 electrons, what would its charge be?  [red6] Such an ion is called a(n)  [red7]

Use your calculator to complete the following calculations….

Use your calculator to complete the following calculations. Give your answer with the correct number of significant figures.   36.6 / 0.0750             [jim5]   848.8 x 0.6250              [jim6]   (1.206 x 1013) / (6.00 x 106)     [jim7]   (27.001 – 12.866) / 5.000              [jim8]