Atomic Structure Question Preview (ID: 47919)


Parts Of An Atom. TEACHERS: click here for quick copy question ID numbers.

A neutral atom of oxygen has atomic number 8 and mass number 18. It has
a) 8 protons, 8 electrons and 10 neutrons
b) 8 protons, 6 electrons and 6 neutrons
c) 10 protons, 8 electrons and 6 neutrons
d) 10 protons, 8 electrons and 8 neutrons

A Magnesium ion consists of 12 protons, 16 neutrons and 10 electrons. What is the charge on the ion?
a) 2+
b) 2-
c) 4+
d) 4-

The atomic number is the same as...
a) number of protons
b) number of neutrons
c) the mass number
d) the charge

If the atom is stable, that means that there are equal numbers of what subatomic particles?
a) Protons and electrons
b) protons and neutrons
c) Neutrons and Electrons
d) Only electrons

What two atomic particles have a mass and where are they located?
a) Protons and neutrons, nucleus
b) Protons and Electrons, nucleus and in the outer rings
c) Protons and neutrons, located in outer rings
d) Electrons and neutron, located in nucleus

Same number of protons and different number of electrons is best described as a(n)...
a) Ion
b) Isotope
c) Mass number
d) Charge

Same number of protons and different number of neutrons is best described as a(n)...
a) Isotope
b) Ion
c) Charge
d) Mass Number

If the average atomic mass for Oxygen is 15.9995amu, is there more O-15 or O-16 isotopes that occur naturally?
a) O-16
b) O-15
c) Both are in equal amounts
d) None of the above

Ca-20, Ca -21 and Ca-22 have the same number of....
a) protons, different neutrons
b) protons, different electrons
c) neutrons, different protons
d) neutrons, different electrons

Who discovered that protons and neutrons form the nucleus?
a) Ernest Rutherford
b) JJ Thomson
c) Robert Millikan
d) John Dalton

Which element has more electrons? Mg 2- or Al 2+
a) Mg 2-
b) Al 2+
c) They are the same
d) No way to tell

An ion with a negative charge is a(n)
a) Anion
b) Cation
c) Isotope
d) Ion

What is the mass number for iron if it's atomic number is 26, it has 28 electrons and 20 neutrons?
a) 46
b) 54
c) 8
d) 10

Who came up with the theory that atoms cannot be created or destroyed and simply change form?
a) John Dalton
b) Ernest Rutherford
c) Robert Milikan
d) JJ Thomson

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