SAT, 26.10.2021 09:00 hannaboo53
helium (he) has two valence electrons, and these electrons are located in the 1s subshell. without using the periodic table, in which group and period is helium located?
Answers: 1
SAT, 24.06.2019 18:00
Remote sensing of the earth's surface and atmosphere may involve the use of what type of instruments?
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SAT, 25.06.2019 16:30
Feedback is given with little or no reservation 1.supportive 2.high-monitoring 3.positive 4.low-monitoring ?
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SAT, 27.06.2019 03:30
In john watson's "little albert' experiment, what was the ucs? select one: a. white rat b. loud noise c. little boy d. anything white and furry
Answers: 1
helium (he) has two valence electrons, and these electrons are located in the 1s subshell. without u...
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