What is the electron configuration for helium (He)?
A. 1s1
B. 1s2
C. 1s22s1
D. 1s...
Chemistry, 08.10.2020 05:01 Leeyah9587
What is the electron configuration for helium (He)?
A. 1s1
B. 1s2
C. 1s22s1
D. 1s22s2
Answers: 1
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Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
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Which of the following is a physical property flammability heat of combustion solubility and toxicity
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