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MuntazerMehdi9746
27.01.2021 •
Chemistry
15
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Which two elements have the same number of valence electrons?
Element
Atomic Number
barium
56
neon
10
silicon
14
carbon
6
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Ответ:
barium and silicon has same valence electrons
Explanation:
barium-2,8,18,18,8,2
neon-2,8
silicon-2,8,2,2
carbon-2,4
Ответ:
Correct answer choice is:
C. A stopwatch
Explanation:
The best a decent eye will do is fix a reading to one tenth of a second, that is so the design of the stopwatch. The digital stopwatch has 2 digits on the far side the seconds, thus it further separates the time in hundredths of a second. Since it's simple to scan to hundredth of a second, that's its design.