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16 Cards in this Set
- Front
- Back
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Why is the mass of a carbon atom greater than the total mass of its protons and electrons?
a)the mass of a proton is greater than the mass of an electron b)a proton is positively charged and and electron is negatively charged c) most of the atom's volume is the sphere shaped cloud of electrons d) one or more neutrons in the nucleus add mass to the atom |
d
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Elements that are shiny conductive solids at room temperature are likely to be classified as:
a) metals b)nonmetals c) inert gases d) semimetals |
a
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What isotope is represented by an atom with 7 protons, 8 neutrons, and 7 electrons? (you can use the periodic table)
a)carbon-12 b)nitrogen-14 c) nitrogen-15 d)oxygen-15 |
c
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What property of aluminum makes it a suitable metal for soft drink cans?
a)electrical conductivity b) malleability c)ductility d) it can reflect light |
b
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What element has an atomic number of 18 (you can use the pt)
a) hydrogen b)oxygen c) fluorine d) argon |
d
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An atom of fluorine has 10 neutrons. What is the total number of other subatomic particles? (pt)
a)9 protons and 9 electrons b) 9 protons and 19 electrons] c) 10 protons and 10 electrons d) 10 protons and 10 electrons |
a
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Which elements are inert gases? (pt)
a)oxygen, fluorine, and neon b) sulfur, chlorine, and argon c) oxygen, fluorine, chlorine d) neon and argon |
d
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Suppose scientists synthesized a new element with the atomic number 120. Use what you know about the periodic table to predict the properties of this new element
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answers are individual
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The atomic mass of iron is 55.847amu why isn't this value a whole number?
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It is the average of the mass of all the isotopes of iron.
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Using the periodic table predict which element - potassium, iron , or aluminum is most reactive.
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Explain
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Which property of the materials used in computer chips makes them useful as switches that turn electricity on and off?
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Their varying ability to conduct electrical current
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Valence electrons in an atom are those that are
a) held most loosely b)of the lowest energy level c)always easily lost d) never easily lost |
a
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An electron dot diagram shows and atom's number of
a) protons b) electrons c) valence electrons d) chemical bonds |
c
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When an atom loses or gains electrons it becomes a(n)
a) ion b)formula c)crystal d) subscript |
a
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A covalent bond in which electrons are shared unequally is a
a) double bond b)triple bond c)polar bond d)nonpolar bond |
c
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The metal atoms in stainless steel are held together by
a) ionic bonds b)polar bonds c) covalent bonds d) metallic bonds |
?
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