Atomic Structure Question Preview (ID: 61105)


What An Atom Is. TEACHERS: click here for quick copy question ID numbers.

The nucleus of an atom has all of the following characteristics except that it
a) is very dense.
b) contains protons and neutrons.
c) is positively charged.
d) contains almost all of the atom’s volume.

What makes an atom electrically neutral?
a) The neutrons balance out the protons and electrons.
b) The nuclear forces contained in the atom neutralize the atom.
c) The number of protons is equal to the number of electrons.
d) The number of protons is equal to the number of neutrons.

The smallest particle of an element that retains the properties of that element is a(n)
a) electron
b) atom
c) proton
d) quark

What does the number 91 represent in the name zirconium-91?
a) the atomic number
b) the number of protons
c) the mass number
d) the sum of protons and electrons

An element has an atomic number of 72. The number of protons and electrons in a neutral atom of this element is
a) 72 protons and 72 electrons
b) 72 protons and 0 electrons
c) 36 protons and 36 electrons
d) none of the above

Which of the following sets is correct?
a) Zn-65, 65 protons, 65 electrons
b) Mg-24, 12 protons, 12 neutrons
c) U-238, 92 protons, 92 neutrons
d) Pb-207, 207 protons, 207 electrons

An atom has an atomic number of 32 and a mass number of 73. How many protons, neutrons, and electrons does this atom contain?
a) 32 protons, 73 neutrons, 32 electrons
b) 73 protons, 73 neutrons, 41 electrons
c) 32 protons, 41 neutrons, 32 electrons
d) 41 protons, 32 neutrons, 41 electrons

Identify the element that has 31 neutrons and a mass of 59.
a) gallium
b) praseodymium
c) thorium
d) nickel

Isotopes of the same element have different
a) chemical properties.
b) masses.
c) atomic numbers.
d) number of protons.

All atoms of the same element have the same
a) number of protons.
b) mass number.
c) number of neutrons.
d) protons and neutrons.

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