Quiz #1-4 PRACTICE: Models of the Atom
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Which of the following discoveries led to the development of the quantum mechanical model?
atoms of gases combined to form compounds in whole-number ratios
most alpha particles passed through gold foil without hitting matter
cathode rays could be bent by a magnetic field
electrons occupied different energy levels around the nucleus
Which of the following statements about subatomic particles is correct?
The mass of a neutron nearly equals the mass of a proton.
Neutrons have no charge and are the lightest subatomic particle.
Electrons, protons, and neutrons all have the same mass.
Protons are positively charged and the lightest subatomic particle.
Electrons are negatively charged and are the heaviest subatomic particle.
The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following?
there are fewer atoms in a copper penny than there are people on earth
in a copper penny, there is one atom for every person on earth
that atoms are very small
that atoms are indivisible
that atoms are very large
Isotopes of the same element have different:
positions on the periodic table
The nucleus of an atom is:
positively charged and has a low density
negatively charged and has a high density
positively charged and has a high density
negatively charged and has a low density
Which scientist proposed the idea of the 'nucleus' after the unexpected results of his students’ gold foil experiment?
Which of the following is a part of Dalton's atomic theory?
All elements are composed of molecules.
Atoms can combine with other atoms to form elements.
Atoms of the same element are alike in mass and size.
Atoms are almost always in motion.
Who was the first person to suggest the idea of electrons?
What particles form the outside of an atom?
none of the above
protons and neutrons
neutrons and electrons
protons and electrons
Which of the following models of the atom best describes Dalton's theories?
a model in which the region outside the nucleus is largely empty space in which the electrons are situated
a model in which the nucleus is made of electrons and protons.
a model in which the atom is a solid sphere
a model in which the nucleus is made of protons, electrons, and neutrons
a model in which the protons, electrons, and neutrons are evenly distributed throughout the volume of the atom
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