| periodic law |
The properties of elements change with increasing atomic number in a periodic way. That's why you can stick the elements into a big chart and have the elements line up in nice families.
출처: misterguch.brinkster.net/vocabulary.html
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| periodic |
a publication composed of issues that appear at regular intervals:
출처: www.teach-nology.com/worksheets/language_arts/voca...
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| periodic abstinence |
Method(s) of family planning based on voluntary avoidance of intercourse by a couple during the fertile phase of the cycle in order to avoid pregnancy.
출처: www.fertilityuk.org/nfps02.html
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| periodicity |
the quality of being regularly recurrent (eg, an outbreak may occur every 8 years).
출처: www.for.gov.bc.ca/tasb/legsregs/fpc/fpcguide/defol...
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| periodic table |
A systematic arrangement of the elements in columns and rows; elements in a given column have similar properties. Periods increase by the atomic number of the elements.
출처: www.hillsdale.edu/AcademicAssociations/Chemistry/s...
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