Each of the following describes an "Atom 1" and an "Atom 2." In which case are the two atoms different isotopes of the same element?
A) Atom 1: nucleus with 6 protons and 8 neutrons, surrounded by 6 electrons;
Atom 2: nucleus with 7 protons and 8 neutrons, surrounded by 7 electrons.
B) Atom 1: nucleus with 7 protons and 8 neutrons, surrounded by 7 electrons;
Atom 2: nucleus with 7 protons and 7 neutrons, surrounded by 7 electrons.
C) Atom 1: nucleus with 8 protons and 8 neutrons, surrounded by 8 electrons;
Atom 2: nucleus with 8 protons and 8 neutrons, surrounded by 7 electrons.
D) Atom 1: nucleus with 4 protons and 5 neutrons, surrounded by 4 electrons;
Atom 2: nucleus with 5 protons and 5 neutrons, surrounded by 4 electrons.
B
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When heavy elements such as uranium undergo fission, there is an accompanying
1) loss of mass, 2) gain of mass, 3) no change in mass, and when light elements such as hydrogen undergo fusion, there is an accompanying 4) loss of mass. 5) gain of mass. 6) no change in mass.
A mole of pure argon gas has _____________entropy than a mixture of a half mole of argon and a half mole of neon?
Fill in the blank(s) with the appropriate word(s).
_____ is proposed dark matter made up of particles other than protons and neutrons
A) Baryonic matter B) Biotic matter C) Nonbaryonic matter D) Abiotic matter
A material has an index of refraction that increases continuously from top to bottom. Of the three paths shown in the figure, which path will a light ray follow as it passes through the material?