When an atom's electron is in an orbital higher than the ground state, the atom is in a (n)

ionized state.

ground state.

neutral state.

excited state.

Neon has three naturally occurring isotopes. They include Ne-20, atomic mass of 19.992 amu and percent abundance of 90.48%; Ne-21, atomic mass of 20.994 amu and percent abundance of 0.27%; Ne-22 has a mass of 21.991 amu and percent abundance of 9.

Which of the following choices would have a positive entropy change? A. 4NO2 (g) + 2H2O (l) + O2 (g) - >4HNO3 (aq) B. Fe2O3 (s) + 3C (s) - >2Fe (s) + 3CO (g) C. 6CO2 (g) + 6H2O (g) - >C6H12O6 (s) + 6O2 (g) D. CaO (s) + CO2 (g) - >CaCO3 (s)

Find the number of moles of water that can be formed if you have 150mol of hydrogen gas and 70mol of oxygen gas.

Use the problem below to answer the question: When a current is passed through a solution of salt water, sodium chloride decomposes according to the following reaction: NaCl + H2O - NaOH + Cl2 + H2 Is this equation balanced?

For a particular isomer of C 8 H 18, C8H18, the combustion reaction produces 5104.1 kJ 5104.1 kJ of heat per mole of C 8 H 18 (g) C8H18 (g) consumed, under standard conditions.

Balance the following equation _NaOH (aq) + _HNO3 (aq) > _NaNO3 (aq) + _H2O (1)

Researchers discovered a subatomic partial while working with the cathode ray tube the particle is known as

An electrochemical cell is constructed such that on one side a pure nickel electrode is in contact with a solution containing Ni2 + ions at a concentration of 2 * 10-3 M.

The lines in an element's atomic spectrum result from electron spins going in opposite directions. energy that is spread out among an atom's electrons. electrons moving from a lower to a higher energy level.

Is Jesus Christ real?