NEW
Font size
WorksheetsCHEMISTRY 1
Total questions: 10
Worksheet time: 5mins
The electrical charges in an atom are located.
in the nucleus
in the proton and neutron.
in the proton and electron
in the proton, neutron, and electron
Rutherford's alpha scattering experiment indicated that.
the nucleus of an atom occupies most of an atom's center
positive charges are dispersed throughout the atom
positive charges are concentrated in a very small core at the atom's
center
protons and neutrons are located in the nucleus
Dalton's atomic theory did not include the postulate that______
matter is made up of small particles called atoms
atoms contain electron, proton, and neutron
atoms are indivisible particles
atoms enter into a chemical reaction
Which of the following is Rutherford's explanation on why alpha particles passed through the gold foil?
An atom contains negatively-charged particles
There must be an empty space in the atom.
There are very thin portions in the atom.
There must be some repulsive forces in the atom
An atom is electrically neutral because
the number of electrons is equal to the number of protons
the nuclear charge is equal to the number of neutrons
the nuclear charge is equal to the number of electrons
the number of neutrons is equal to the number of protons
Which is true for the atomic structure?
The neutrons and electrons have the same mass.
The neutrons and protons have opposite charges.
In the nucleus are the protons, electrons and the neutrons.
The protons and electrons are equal in number but have opposite
charges.
Which of the following experiments determined the charge of an electron?
oil-drop experiment
gold-foil experiment
cathode ray tube experiment
canal rays experiment
Who proposed the atomic theory in the 18th century?
Antoine Lavoisier
John Dalton
Pierre Gassendi
Robert Boyle
Which of the following is NOT a postulate in Bohr's theory?
An electron moves around the nucleus.
An electron moves in an angular momentum.
Each stationary state in an orbital is associated with a certain energy
Electrons emit and absorb energy in a stationary state
An atom is
a tiny indivisible particle the smallest piece of matter
the smallest piece of matter
the smallest particle of an element that retains the chemical identity
of the element that retains the chemical identity of the element
an artificially assembled unit that contains proton and neutron
