Chemistry, 27.08.2021 04:30 eliseeimbody
Why are there only two elements in the first period of the periodic table? (1 point)
because each row increases in atomic mass by a specific number, so anything over five is in the second row
O because the next elements have other things in common and they need to be arranged together
because the first two elements both start with H and are grouped together
o because only two electrons can fit in the first orbit around the nucleus, and each period on the table is organized by number of orbits
Answers: 2
Chemistry, 21.06.2019 16:30
Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)
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Calculate the molarity of the solution. 6.02 x 1022 molecules of hci (molecular weight = 36.5 g/mole) in 2.0 liters of water m
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Compare and contrast physical changes with chemical changes.
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Chemistry, 22.06.2019 10:00
Part 1: include important facts found through your research. part 2: include your visual display. include your summary of “the chemistry of water” from the national science foundation website. include your experiment. part 3: include responses to the reflection questions.
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Why are there only two elements in the first period of the periodic table? (1 point)
because each...
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