Home › AP Chemistry › Chemistry › Electronic Structure and Periodic Properties › The SI unit of frequency, one cycle per second, …
The SI unit of frequency, one cycle per second, is the:
AThe hertz
BThe joule
CThe newton
DThe angstrom
Answer & Solution
Correct answer: A. The hertz
1. Frequency counts how many wave cycles pass a point each second.
2. The unit for frequency, expressed as cycles per second, is the hertz.
3. A joule measures energy and a newton measures force.
4. An angstrom is a length, equal to 0.1 nanometres.
_Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 6 'Electronic Structure and Periodic Properties of Elements', sections 6.1-6.5_
Related questions
Microwave frequencies suit communication applications because such waves tend not to be:Newton's own explanation of light treated it as:The wavelength axis of the spectra shown uses the angstrom, where one angstrom equals:Bohr's model succeeded for hydrogen but he could not extend it to helium because helium haIn 1885 Johann Balmer derived an empirical equation relating hydrogen's four visible wavelEach emission line from a gas consists of a single wavelength, which implies the emitted lMaking the light brighter in a photoelectric experiment increases:In the photoelectric effect, electrons are ejected from a clean metal surface only when th