Copper has an atomic number of 29. that means that there are 29 protons in the nucleus of each copper atom. that's what the atomic number is; the number of protons in an atom of a certain element. if one copper atom contains 29 protons, how many electrons are there in in 3 atoms of copper?

Pauling and lewis questioned the extreme definitions of bonds. they wondered if bonds might be described somewhere in between the two extremes (covalent and ionic). on the basis of experimental data,pauling confirmed that bonds could be ionic, covalent, and for those, in between, exhibit a degree of ionic character. he theorized that the major factor was how strongly the atoms in the bond attracted the electrons. pauling called this factor - the tendency of an atom to attract electrons in a bond.

Calculate the number of molecules present in 0.750 mol of mgo.

What is the formula for the compound dinitrogen pentoxide? a. n4o5 b. n5o4 c. n4o6 d. n5o2 e. n2o5