Twitter Google Share on Facebook the present or current time, as distinguished from all other times. See also:Period Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co. Want to thank TFD for its existence?Tell a friend about us, add a link to this page, or ...
The meaning of PERIOD is the completion of a cycle, a series of events, or a single action : conclusion. How to use period in a sentence. Synonym Discussion of Period.
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In the periodic table of the elements, elements are arranged in a series of rows (or periods) so that those with similar properties appear in vertical columns. Elements of the same period have the same number of electron shells; with each group across a period, the elements have one more ...
1 length of time 时间长度PERIOD OF TIME a particular length of time with a beginning and an end 一段时间;时期 Tomorrow’s weather will be dry with sunny periods. 明天天气干燥,间或晴朗。 period of His playing improved in a very short period of time. 他的演奏技巧在很短时间内就有了提...
1) This question is about the Periodic Table.a) How many elements are there in period 3 of the Periodic Table?(1)b)Place the first 3 elements of period 3 in order of increasing reactivity.(1)c) Explain your reasoning to part (b).(1)d) Mark with an × the statement that best des...
a.the time required by a body to make one complete rotation on its axis b.the time interval between two successive maxima or minima of light variation of a variable star 6.Chemone of the horizontal rows of elements in the periodic table. Each period starts with an alkali metal and ends ...
A periodic table is the tabular display of all the known chemical elements arranged on the basis of their atomic number and electronic configuration...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer yo...
Now, a reinterpretation of the relationship of the first-period elements to successive elements may help make the eight-period table an attractive choice for the 21st century.doi:10.1007/s00897010515aGary Katz1. Periodic Roundtable, Cabot, VT, 05647 ;...
[C]句号,句点a full stop 英英释义 period[ 'pɪərɪəd ] n. an amount of time "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period" 同义词:time periodperiod of time one of three periods of play in hockey games ...