Chemistry, 10.12.2021 08:40 oliviaprejean18
Which of the following statements are true about the elements? Select all that apply.
Ο it is in the 8th period on the periodic table.
Ο it has more protons than barium (Ba).
Ο it has zero valence electrons.
Ο it is a smaller atom than hydrogen (H).
Ο it has the same atomic number as magnesium (Mg).
Answers: 3
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The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms
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Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.
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Chemistry, 22.06.2019 19:30
Draw the lewis structure for the trisulfur s3 molecule. be sure to include all resonance structures that satisfy the octet rule.
Answers: 3
Which of the following statements are true about the elements? Select all that apply.
Ο it is in t...
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