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WorksheetsChapter 7: Understanding the Atom
Total questions: 30
Worksheet time: 23mins
Which of the following is NOT a developer of an atomic model?
Dalton
Planck
Rutherford
Thomson
Which of the following determined that cathode rays are negatively charged?
Aristotle
Dalton
Rutherford
Thomson
Which of the following found that atoms have a nucleus?
Aristotle
Dalton
Rutherford
Thomson
Which of the following was invented in 1981 and allowed scientists to first see individual atoms?
scanning tunneling microscope
atomic microscope
scanning telescope
visualizing microscope
The three basic components of an atom are _____.
protons, neutrons, and ions
protons, neutrons, and electrons
protons, neutrinos, and ions
protium, deuterium, and tritium
The nucleus of an atom consists of _____.
electrons
neutrons
protons and neutrons
protons, neutrons, and electrons
A single proton has which electrical charge?
no charge
positive charge
negative charge
either a positive or a negative charge
Which two particles would be attracted to each other?
electrons and neutrons
electrons and protons
protons and neutrons
All particles are attracted to each other.
When Rutherford performed his metal foil experiment, he was surprised that most of the alpha particles ____.
were deflected by the foil
bounced back from the foil
were absorbed by the foil
passed straight through the foil
Which item best represents Dalton’s mental image of an atom?
a cork
a candy bar with nuts
a marble
a balloon full of air
Which item best represents Thomson’s mental image of an atom?
a sponge
a chocolate-chip cookie
a bowling ball
a beach ball
Based on his experiment, Rutherford concluded that atoms were ____.
dense positively charged particles
uniform throughout
mainly empty space
made of protons, neutrons, and electrons
The energy levels of an atom are occupied by ____.
electrons
protons
neutrons
ions
Who proposed this model of atoms?
Dalton
Democritus
Rutherford
Thomson
Which scientists proposed this model for atoms?
Dalton
Democritus
Rutherford
Thomson
Which scientist developed this model for atoms?
Dalton
Democritus
Rutherford
Thomson
A certain atom has 26 protons, 26 electrons, and 30 neutrons. It mass number is ____.
26
30
52
56
The particles that make up an atom are ____.
electrons, protons, and nuclei
elements, protons, and electrons
protons, neutrons, and nuclei
protons, neutrons, and electrons
In an atom, electrons ____.
are located in the nucleus
are paired with neutrons
travel outside the nucleus
are always in the same place in an atom
Which of the following statements about the atom is false?
Each atom has a tiny nucleus at its center
All the protons and neutrons are located in the nucleus
Electrons travel in definite circular pathways around the nucleus.
All atomic nuclei are positively charged.
Which particles have almost the same mass?
proton and electron
proton and neutron
electron and neutron
all three particles
If two atoms have the same number of protons but different numbers of neutrons, they will have the same ____.
half-life
mass number
atomic number
degree of stability
Of the three main subatomic particles, the ____________________ has the least mass.
protons
neutrons
electrons
ions
Sodium (Na) contains 11 protons and 12 neutrons. How can you use this information to determine the mass number of sodium?
add the number of protons and neutrons
subtract the number of protons from the number of neutrons
add the number of protons with the number of electrons
subtract the number of neutrons from the number of protons
_____________ created an atomic model containing a sphere of positive charge with negatively charged electrons within it.
Thomson
Democritus
Dalton
Chadwick
___________ can create images of atoms.
Cathode Ray Tube
Scanning Tunneling Microscope
Thermometer
Barometer
___________ discovered neutrons
Thomson
Dalton
Chadwick
Curie
___________________ first called the building blocks of matter atoms.
Democritus
Rutherford
Chadwick
Curie
_____________ proposed a circular path for electrons.
Curie
Chadwick
Bohr
Aristotle
___________________ used the gold foil experiment to observe alpha particles.
Rutherford
Thomson
Dalton
Chadwick
