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| On the periodic table, _____a_____ go up and down, and ____b______ go left to right. |
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Moving from left to right across a row on the periodic table, which of the following values increases by exactly one from element to element?
a.) isotope number
b.) atomic number
c.) atomic mass unit
d.) mass number |
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Which list of elements contains only metals?
a.) carbon, iodine, tin
b.) tin, copper, cesium
c.) helium, iron, copper
d.) iodine, carbon, argon |
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Which statement is TRUE about metalloid silicon?
a.) Silicon is a better conductor of electric current than silver is
b.) Silicon does not conduct electric current under any conditions
c.) Silicon's ability to conduct electric current does not vary with temperature
d.) Silicon is a better conductor of electric current than sulfur is |
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Definition
d.) Silicon is a better conductor of electric current than sulfur is
(becuase silicon is closer to the left side of the periodic table than sulfur, which means it has more metalic properties.) |
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At room temperature, none of the metals are __________
a.) soft
b.) liquids
c.) malleable
d.) gases |
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Definition
d.) gases
The alkali (Group 1) metals are soft at room temperature.
Mercury is a liquid at room temperature.
Gold and silver are malleable at room temperature. |
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Term
Which general statement does NOT apply to metals?
a.) most metals are ductile
b.) most metals are malleable
c.) most metals are brittle
d.) most metals are good conductors of electric current |
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Definition
C.) Most metals are brittle
a. Applies - copper is prized for its ductility
b. Gold (Au) and silver (ag) are very malleable, which is how they are made into ornaments
d. Metals let electrons flow easily since they are usually unbalanced
Therefore the answer is C, since it contradicts both A and B unless in the case of some metals, like beryllium |
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Term
Group 7A of the periodic table contains the
a.) most reactive nonmetals
b.) most reactive metals
c.) least reactive metals
d.) least reactive metals |
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Definition
| A.) Group 7a of the periodic table contains the MOST REACTIVE NONmetals |
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Term
Two highly reactive elements in period 2 are the metal and lithium and the
a.) metalloid arsenic
b.) nonmetal selenium
c.) nonmetal flouride
d.) nonmetal krypton |
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Definition
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Term
| Atoms of the MOST REACTIVE elements tend to have ___ OR ___ valence electrons. |
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Definition
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As you move from left to right across a period, the number of valence electrons
a.) increases
b.) stays the same
c.) increases and then decreases
d.) decreases |
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Definition
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Term
| What does group 6A elements have compared to group 2A? |
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Definition
More atoms in the ground state.
[ What are the elements in groups 2A called? Alkali Earth Metals |
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Term
| If a member of the boron family has 3 valence electrons, how many should a member of the nitrogen family have? |
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Definition
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Term
Which statement is NOT true about the elements flourine, chlorine, and iodine?
a.) They are all hallogens
b.) They react easily with metals
c.) They are similar to noble gasses
d.) They are all nonmetals |
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Definition
c.) it is not true that those elements are similar to noble gasses... since those elements are halogens, they are in group 7 and have 7 valence electrons. In contrast, Noble gasses have 8 valence electrons, and low reaction
its not a bc they are all hallogens bc they are all in (group 7) |
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Term
Which of the following Group 1A elements is the most reactive?
a.) Cs (Cesium)
b.) Li (Lithium)
c.) K (Potassium)
d.) Na (Sodium) |
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Definition
| a.) Cs (Cesium) is the most reactive because it is the farthest down on the periodic table,and since it is in metals, reactivity increases the further down it is on the periodic table. |
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Term
Which of the following group 7A elements is the most reactive?
a.) Cl (chlorine)
b.) I (Iodine)
c.) F (flourine)
d.) Br (bromine) |
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Definition
| c.) flourine... bc it is the furthest up on the periodic table.. which in nonmetals, indicates the hightest level of reactivity |
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Term
Which of the following gases emit colors when an electric current is applied?
a.) hydrogen and helium
b.) argon an krypton
c.) flourine and chlorine
d.) oxygen and nitrogen |
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Definition
B.) argon and krypton
emit colors when electric current is applied.
They are nobles gases (group 8) which is the same as neon |
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Term
The tendency of an element to react is closely related to
a.) its atomic mass
b.) attractions betweem its atoms
c.) the number of valence electrons in the atoms of an element
d.) the nration of protons to neautrons of the element |
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Definition
c.) the number of valence electrons in atoms of the element..
..is closely related to the tendancy of an element to react |
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