We have atom of sodium (z 11), find: (a) what is the electron configuration of sodium in its ground state? in its first excited state? (b) give the spectroscopie notation s l) for each of these states in the ls coupling approximation. (c) what are the sodium "d-lines" and why do they form a doublet?

According to newton's second law, when the same force is applied to two objects of different masses, a the object with greater mass will experience a great acceleration, and the object with less mass will experience an even greater acceleration, b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration, c. the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration, d. the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration.

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.