unit 3 l1 and 2
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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| atom | is the smallest particle into which an element can be divided and still be the same element
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| nucleus | a small, dense center that has a positive charge and is surrounded by moving electrons
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| protons | the positively charged particles in the nucleus
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| electrons | the particles in the atoms that are negatively charged
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| neutrons | uncharged particles that the nucleus contains
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| electron cloud | electrons that move within an area around the nucleus
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| atomic number | the number of protons in the nucleus of anatom
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| mass number | the total number of protons and neutrons in an atoms nucleus
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| periodic table | arrangement of the elements
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| chemical symbol | is an abbreviation for the elements name
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| average atomic mass | of an atom is the weighted average of the masses of all the naturally occurring isotopes of that element
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| metals | are elements that are shiny and conduct heat heat and electricity
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| nonmetals | are poor conductors of heat and electricity
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| metalloids | are elements that have some properties of metals and some properties
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| group | verticle column in the periodic table
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| period | horizontal row of elements on the periodic table
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
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.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
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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