Atom Review: Question Preview (ID: 21768)


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Most of an atom is made up of --
a) protons b) neutrons c) electrons d) empty space
Niels Bohr proposed an atomic model in which electrons move around the nucleus in circular orbits. This model is now thought to be incorrect because electrons -
a) move from an inner orbit to an outer orbit when energy is absorbed b) move from an outer orbit to an inner orbit when energy is lost c) do not move around the nucleus of the atom d) do not move around the nucleus in circular orbits
All matter in our world, from the single-celled amoeba to the tallest skyscraper in New York City, consists of very small units called -
a) atoms b) cells c) compounds d) particles
How do you determine the number of neutrons in an atom?
a) It is the same as the atomic number b) It is the same as the atomic mass c) It is equal to the atomic mass minus the atomic number d) Count the columns on the periodic table
If you took all of the atoms out of a chair, what would be left?
a) Only a pool of liquid would be left on the floor b) The chair would still be there but it would weigh less c) The chair would be exactly the same as it was before d) There would be nothing left of the chair
How do you determine the number of valence electrons in an atom?
a) It is the same as the atomic number b) It is the same as the atomic mass c) It is equal to the atomic mass minus the atomic number d) Count the columns on the periodic table
How do you determine the number of electrons in an atom?
a) It is the same as the atomic number b) It is the same as the atomic mass c) It is equal to the atomic mass minus the atomic number d) Count the columns on the periodic table
Which subatomic particle can not be changed and can be used to identify an atom?
a) Proton b) Neutron c) Electron d)
How do you determine the number of protons in an atom?
a) It is the same as the atomic number b) It is the same as the atomic mass c) It equal to the atomic mass minus the atomic number d) Count the columns on the periodic table
What is an isotope?
a) An atom with more or less protons than usual b) An atom with more or less electrons than usual c) An atom with more or less neutrons than usual d)
Electrons that exist on the edge of the atom are called...
a) Balance electrons b) Outer electrons c) Boundary electrons d) Valence electrons
What is an ion?
a) An atom with more or less protons than usual b) An atom with more or less electrons than usual c) An atom with more or less neutrons than usual d)
The area containing electrons is called...
a) the electron region b) the electron cloud c) the electron orbitals d) the electron collectron
Which subatomic particle has a neutral charge?
a) Proton b) Neutron c) Electron d)
Where are protons found?
a) In the nucleus b) In the electron cloud c) On the valence shell d) Outside the nucleus
Where are neutrons found?
a) In the nucleus b) In the electron cloud c) On the valence shell d) Outside the valence shell
Which subatomic particle has a negative charge?
a) Proton b) Neutron c) Electron d)
Which subatomic particle has a positive charge?
a) Proton b) Neutron c) Electron d)
How many neutrons does the element argon have?
a) 40 b) 22 c) 18 d) 8
How many protons are in an atom of the element chlorine?
a) 7 b) 17 c) 18 d) 35
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