Which number indicates the energy level of an atom's valence electrons? answers?

Which conclusion could be made from Ernest Rutherford's gold foil experiment?

The density of iron is 7.87 g/ml. what is the mass of a 5.00 cm * 4.00 cm * 1.00 cm block of iron?

What's the difference between kinetic energy and potential energy?

When solid ammonium chloride dissociates at a certain temperature in a 0.500 dm3 container, ammonia and hydrogen chloride are formed. NH4Cl (s) NH3 (g) + HCl (g) The initial amount of ammonium chloride was 1.

For the balloon to float, what is the minimum temperature tmin of the hot air inside it?

When magnesium combines with oxygen, the reaction involves a. a conversion of protons into electrons. b. sharing of electrons between Mg and O. c. transfer of electrons from Mg to O. d. transfer of electrons from O to Mg.

The activation energy for the reaction no2 (g) + co (g) ⟶no (g) + co2 (g) is ea = 100 kj/mol and the change in enthalpy for the reaction is δh = - 375 kj/mol.

What process transform solar energy into chemical energy?

When the reaction was carried out the calculated theoretical yield for water was 176 grams but the measured yield was 148 grams what is the percent yield

For an atom's electrons, how many energy sublevels are present in the principal energy level n = 4?