Question

(b) ground state
c. quantum state
d. emission state

1. what is a \photon\?

a. a negatively charged subatomic particle
b. a discrete bundle or \packet\ of electromagnetic energy
c. the fixed path an electron takes around the nucleus
d. the unit used to measure frequency

1. the si unit for frequency, representing cycles per second, is the:

a. joule
b. meter
c. hertz
d. photon

1. which model uses mathematical equations to describe the probability of finding an electron in a certain location?

a. bohr model
b. quantum mechanical model
c. dalton’s atomic theory
d. rutherford model

1. the \atomic emission spectrum\ of an element is often compared to a:

a. fingerprint (unique to each element)
b. mirror (reflects all light)
c. shadow (absence of light)

Explanation:

1. A photon is defined as a discrete packet of electromagnetic energy. Option A describes an electron, option C is a Bohr model electron path, option D is incorrect as frequency is measured in hertz.
2. The SI unit for frequency (cycles per second) is the hertz. Joule is for energy, meter for length, and photon is a light particle, not a unit.
3. The Quantum Mechanical Model uses mathematical equations (wave functions) to calculate the probability of finding an electron in a region. The Bohr model uses fixed orbits, Dalton's theory is about indivisible atoms, and Rutherford's model describes a nuclear atom without probability equations.
4. Each element has a unique atomic emission spectrum, so it is compared to a fingerprint, which is unique to each individual. Mirrors and shadows do not match this unique identifying property.

Answer:

1. B. A discrete bundle or "packet" of electromagnetic energy
2. C. Hertz
3. B. Quantum Mechanical Model
4. A. Fingerprint (unique to each element)