An neutral atom of an element has 2 electron with n=1, 8 electron with n=2, 8 electron with n=3, 1 electron with n=4 what is the atomic number proton and neutron

How are elements arranged in a periodic table

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)