A carbon atom has six protons and six neutrons. What is its
atomic number?

Why does his teacher ask him to balance the equation by including the correct coefficient

Compare and contrast the bohr model and the electron cloud models of the atom.

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm