8.5B Question Preview (ID: 49263)
Element Identity And Reactivity.
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A group of students examine a Bohr model of an atom with 8 valence electrons. What conclusion can the students make about the chemical reactivity of the element?
a) The element is extremely reactive because the outer energy level is full.
b) The element is nonreactive because the outer energy level is full.
c) The element is somewhat reactive because the outer energy level is full.
d) Additional information is necessary to determine reactivity.
Which statement best explains why protons are used to identify an element?
a) Protons are the most easily identified subatomic particles.
b) Positive charges are most easily detected during an experiment than negative and neutral charges.
c) The number of protons is unique to each element and remains constant.
d) Protons, electrons, and neutrons must all be known.
Teo students debate teh number of valence electrons in an atom of sulfur. Which tool would be most helpful in obtaining this information?
a) scale
b) dichotomous key
c) periodic table
d) microscope
Where are valence electrons located?
a) near the nucleus
b) in the middle of the atom
c) at the innermost level
d) at the outermost level
Which statement is most helpful in identifying an element?
a) The element has 36 protons.
b) The element has 6 neutrons.
c) The element has 8 valence electrons.
d) The element has properties similar to nitrogen.
Which statement would be most helpful in determining an element's reactivity?
a) The element has the same number of electron shells as iodine.
b) The element has the same number of valence electrons as cesium.
c) The element has 47 neutrons.
d) The element is a metal.
Which element contains 7 protons and 5 valence electrons?
a) Boron
b) Vanadium
c) Nitrogen
d) Lithium
The atomic number of an element is equal to its number of protons. Therefore, a logical conclusion is that the number of protons determines an element's
a) mass and atomic weight
b) number of stable isotopes
c) identity
d) state of matter
Which information provided by the periodic table can help identify an element's reactivity?
a) period number
b) group number
c) mass number
d) atomic number
What kind of information can help to identify an element?
a) protons
b) neutrons
c) atomic mass
d) electrons
An element has 2 protons, what element is it?
a) Beryllium
b) Lithium
c) Helium
d) Oxygen
Which of the following characteristics is similar for Fluorine and Iodine?
a) number of protons
b) number of neutrons
c) number of orbitals
d) number of valence electrons
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