Answer:
Number of protons is 9
Number of electrons is 9
Number of neutrons is 10
Explanation:
Atomic number refers to the number of protons or electrons in an atom, so the electrons and protons are 9.
Atomic mass is the sum of the number of protons and neutrons.
Therefore, there are 10 neutrons in the atom's nucleus
Answer:
2.1 mol
Explanation:
68.1g / 34.1 g/mol = 2.1mol
Answer:
21. c
22. Water is pulled by gravity down below the cave mud. Go to GROUNDWATER. Water gathers into a passage as a spring & flows out
Explanation:
D
Molecular motion increases as temperature increases and therefore increasing the molecular motion increases collision frequency.
Explanation:
When a substance is heated, its molecules gain increased kinetic energy even as the substance increases in temperatures. With higher kinetic energy, this means the molecules are moving more rapidly and hence collision between the molecules will be more frequent and of higher energy. It is these high energy collisions that cause the molecules to move further away from each other with increased temperatures (why substances expand).
Learn More:
For more on relationship between temperatures and molecular motion check out;
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Answer:
a bright line spectrum is prodecued when an electron falls from a higher energy state
Explanation:
not sure if this is the exact answer you're looking for but it should be similar
