LECTURE 2.1 ATOMIC STRUCTURE

The energy of each orbit is

• changed

• fixed

• not the same

• not the same

Energy is inversely proportional to

• wavelength

• frequency

• speed of light

• Planck's constant

According to Bohr's model, how do electrons travel?

• Electrons move in and out of the nucleus

• Electrons do not move

• Electrons move in circular orbits around the nucleus

• Electrons move in a straight line

Electrons can change their orbit by emitting or absorbing energy

• True

• False

When an electron jumps from its orbit to another orbit, energy is

• emitted only

• absorbed only

• absorbed only

• emitted or absorbed

What determines the difference in energy between two energy levels?

• Distance between the two energy levels

• Number of electrons in the energy levels

• Distance from the nucleus

• Number of valence electrons

When an electron jumps from one energy level to another energy level, what determines the size of the jump?

• Distance between energy level

• Charge of the electron

• Atomic number of the element

• Amount of energy

Which of the emission series is incorrect?

• Balmer

• Paschen

• Paschen

• Lymen

Emission of light from an atom occurs when an electron

• drops from a higher to a lower energy level

• moves within its atomic orbital

• jumps from a lower to a higher energy level.

• falls into the nucleus

A spectrum containing only electromagnetic radiation of discrete specific wavelengths is known as

• line spectrum

• continuous spectrum

• visible spectrum

• valence spectrum