Chemistry, 30.09.2020 02:01 mallorytaylor279
Which statement accurately describes the atoms of a specific element?
A- A meroury, Hg, atom contains 80 electrons and 80 protons inside the nucleus.
B- A palladium, Pd, atom contains 46 electrons outside the nucleus and 45 neutrons inside the nucleus
C- An antimony, Sb atom contains 51 protons inside the nucleus and 51 electrons outside the nucleus.
D- An iridium, It, atom contains 77 protons inside the nucleus and 115 neutrons outside the nucleus.
Answers: 1
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The melting point of sulfur is 115 °c and its boiling point is 445 °c. what state would sulfur be in at 200 °c?
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Chemistry, 23.06.2019 04:30
Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction
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Chemistry, 23.06.2019 04:31
How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.
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Chemistry, 23.06.2019 05:30
Calculate the temperature rise when 0.2g of propane is used to heat 400cm cubed of water.
Answers: 3
Which statement accurately describes the atoms of a specific element?
A- A meroury, Hg, atom contai...
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