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12 Cards in this Set
- Front
- Back
. In a modern periodic table, elements are arranged in order of?
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abc oder
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How many periods does the modern periodic table have?
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103 periodics tables
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3. An element that is shiny and conducts electricity is likely to be a?
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metal
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. Elements that have the same number of valence electrons are:
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a electron that is on the outer shell
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The most reactive metals, which are soft and silvery-white are the:
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alkai metals
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What is the octet rule?
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win addums lose or gang all the electrons
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What do all nonmetals have in common?
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they dont cunduct elctersidy
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. Which class on the periodic table shares properties with both metals and nonmetals?
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can idinuffy metals
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9. Using your periodic table and your knowledge of the relationship between group and number of valence electrons, how many valence electrons would Magnesium have?
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8
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10. Which of the following elements is a metalloid?
a. copper b. indium c. silicon d. carbon |
b
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11. Using your periodic table and your knowledge of the relationship between period and number of electron energy levels, how many energy levels does strontium have?
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5
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12. Use your periodic table to look up the atomic number and atomic mass of Boron. How many protons does Boron have?
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5
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