McC 8 Chem Ch 3
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| period | horizontal row of elements in the periodic table whose properties change gradually and predictably
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| group | family of elements in the periodic table that have similar physical or chemical properties
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| representative elements | elements in Groups 1 & 2, and 13 - 18 in the periodic table that include metals, metalloids and nonmetals
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| transition elements | elements in Groups 3 - 12 in the periodic table, all of which are metals
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| metal | element that has luster,
is malleable and ductile,
is a good conductor of heat and electricity
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| metalloid | element that shares some properties with metals and nonmetals
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| nonmetals | element that is usually a gas or brittle solid at room temperature and is a poor conductor of heat and electricity
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| How did Mendeleev arrange the periodic table? | by increasing atomic mass
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| How did Moseley arrange the periodic table? | by increasing atomic number
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| How is the modern periodic table arranged? | by increasing atomic number
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| Where are metals located on the periodic table? | to the left of the stair step line
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| Where are the nonmetals located on the periodic table? | to the right of the stair step line plus Hydrogen
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| Where are the metalloids located on the periodic table? | along the stair step line except Aluminum which is a metal
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| oxidation number | the number of electrons an atom will gain, lose or share in order to bond and complete its outer energy level. A '+' means the atom will LOSE electrons. A '-' means the atom will GAIN electrons.
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| valence electrons | electrons in the outer most energy level
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| ionic bond | bond between metals and nonmetals
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| covalent bond | bond between nonmetals or 2 atoms of the same element
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| metallic bond | bond between metals
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| What is the maximum number of valence electrons? | 8
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| Where do you look on the periodic table to quickly tell the number of energy levels an element has? | the period number
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| Where do you look on the periodic table to quickly tell the number of valence electrons an element has? | at the one's place of the group number -
Group 1 has 1 valence electron -
Group 17 has 7 valence electrons
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| Octet Rule | atoms gain, lose or share electrons until they have a full outer shell (most need 8 valance electrons to be stable)
Hydrogen and Helium are exceptions
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| '+' oxidation number | a '+' means an atom will lose electrons
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| '-' oxidation munber | a '-' means an atom will gain electrons
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| properties of metals | shiny, ductile, malleable,conductor of heat & electricity
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| properties of nonmetals | dull, brittle, insulator
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| properties of metalloids | properties of both metals & nonmetals
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| When you are making a compound, the oxidation numbers should add up to what number? | 0
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| synthetic | elements made in a lab
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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