27.15. P http://www.ck12.org
27.15 P
partial pressure
The pressure that each individual gas exerts.Pauli exclusion principle
No two electrons in same atom can have the same set of four quantum numbers.percent abundance
The percentage of atoms in a naturally occurring sample of the pure element that are a particular isotope.percent error
An expression of the accuracy of a measurement, standardized to how large the measurement is.percent uncertainty
The ratio of the uncertainty to the measured value, multiplied by one hundred.percent yield
The ratio of the actual yield to the theoretical yield, expressed as a percentage.periodic law
States that when elements are arranged in order of increasing atomic number, there is a periodic repetition of
their chemical and physical properties.periodicity
Repetitive variations or trends in element properties.PET
Positron emission tomography (PET), often referred to as a PET scan. One of the more useful approaches to
radioisotope use in medicine. This technique is useful in studying the processes in the brain.pH
The negative logarithm of the hydrogen ion concentration.philosopher’s stone
A substance that could cause the transmutation of lead into gold.phlogiston
Substance previously thought to be a unstable component of all combustible substances.photoelectric effect
Under the right conditions, light can be used to eject electrons from a solid material.photoemissive
Materials that eject electrons when illuminated with light, such as potassium.