Chemistry Chap. 4: Electrons in Atoms (Def. & Review)

Frequency & wavelength are directly proportional, meaning as one increases so does the other.

• True

• False

Planck stated that the amount of energy given off is directly related to the frequency of light emitted, or E=hv.

• True

• False

When an atom loses energy, it is said to be in an excited state.

• True

• False

A hertz is one peak, or cycle, per minute.

• True

• False

When electrons gain energy, they move closer to the nucleus. When they lose energy, they move further away from the nucleus.

• True

• False

An electron will take an empty orbital within a sublevel rather than pair with another electron.

• True

• False

Which of the following is not a quantum number?

• p

• m

• n

• s

What is the name of the second sublevel?

• s

• d

• p

• f

What is the value for “c”, the speed of light?

• 8.00 X 10³ m/s

• 6.626 X 10^-34 m/s

• 3.00 X 10⁸ m/s

• 3.00 X 10² m/s

Heisenberg’s uncertainty principle pointed out that is impossible to know the exact:

• wavelength and charge of an electron at the same time.

• momentum and wavelength of an electron at the same time.

• mass and charge of an electron at the same time.

• position and velocity of an electron at the same time.