Introduction To Atoms: Question Preview (ID: 15503)

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Which of the following subatomic particles are found in the nucleus of an atom?
a) electrons and protons b) neutrons and protons c) electrons and neutrons d) ionic compounds
Given the size of electrons, what can you infer about atoms?
a) They are very fast-moving. b) They are a good light source. c) They are composed mainly of space. d) They are always radioactive.
On an element key, to what does the atomic number refer?
a) atomic mass b) atomic weight c) number of protons d) number of protons and neutrons
Which subatomic particle carries a positive charge?
a) proton b) electron c) neutron d) quark
If an atom has a neutral charge, what must be true?
a) The number of electrons must be below 10. b) The number of neutrons must be greater than the number of protons and electrons combined. c) The number of protons must equal the number of electrons d) The number of protons must be less than the number of electrons.
What part of the atom contains the most mass?
a) orbital space b) electrons c) neutrons d) nucleus of the atom
Which subatomic particles comprise most of the atom's mass?
a) protons and electrons b) protons and neutrons c) electrons and neutrons d) protons, neutrons, and electrons
If an atom has an atomic number of seven, and an atomic mass of 13, which of the following is true?
a) There are 13 protons. b) There are 20 electrons. c) There are 6 neutrons. d) There are 7 electrons
What is the atomic number of an atom that has 8 neutrons and a mass of 16?
a) 2 b) 8 c) 16 d) 24
What atoms has an atomic number of 6 and an approximate mass of 12?
a) hydrogen b) oxygen c) carbon d) nitrogen
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