All atoms of the element vanadium must have the same (1) atomic number (2) mass number (3) number of neutrons plus electrons (4) number...

When an atom of hydrogen and an atom of chlorine combine to form a molecule of hydrogen chloride, a bond is (1) formed as energy is...

In the ground state, which shell of a potassium atom has an electron with the greatest amount of energy? (1) first (2) second (3) third...

What is the number of protons in an atom with the electron configuration of 2-5? (1) 5 (2) 2 (3) 3 (4) 7 Answer and Explanation: If we...

Compared to a 1.0-L sample of CO2 (g) in a sealed, rigid container at STP, a 1.0-L sample of CH4(g) in a sealed, rigid container at STP...

In which of the following compounds does nitrogen have +5 charge? a.HNO3 b.N2 c.NO2 d.N2O e.NH2OH For a neutral molecule, all of the...

How to balance nuclear equations? Sum of mass numbers on the left must equal to the sum of mass numbers on the right. Likewise, sum of atomi

The further an electron is from the nucleus, the higher it's energy is. Therefore, electrons in the valence shell (outermost shell) have the

What is the chemical name of the compound NH4SCN? (1) ammonium thiocyanate (2) ammonium cyanide (3) nitrogen hydrogen cyanide (4)...

Which electron configuration represents the electrons in an atom of sulfur in an excited state? (1) 2 – 8 – 6 (2) 2 – 7 – 7 (3) 2 – 8 – 7...