Blog

How many electrons are present in a bromine atom with a mass number of 87?

How many protons, electrons, and neutrons, respectively, does 81Br have?

The total number of oxygen atoms indicated by the formula Ti3(PO4)2 is

How many atoms of hydrogen are in three molecules of C4H9Cl?

How many protons are in the atom ?

H2 is a/an

The electron configuration for an atom is 1s2 2s2 2p3.  The atomic number of the element is

CH2 is an example of what type of formula?

Given the following information, calculate the weighted average atomic mass of xx. Isotope % Abundance Atomic Mass X-63 69.092% 62.930amu X-65 30.91% 64.928amu

For 5 bonus points, if the wavelength of a certain color of light is 724nm, what is the corresponding frequency?