29. Which is the electron configuration of an atom in the excited state?
(1) 1s 2s²2p2
(2) 1s 2s22p'
(3) 1s 2s22p5352
(4) 1s²2s²2p%35'

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl

bcde is the incorrect answer it is a

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)