unit 3 lesson 1&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 | smallest particle into which an element can be divided and still be the same element
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| electrons | negative charged particles
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| nucleus | small dense center positive charge surronded by moving electrons
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| proton | positively charged
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| neutron | have no electric charge
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| electron cloud | negative particles moving around nucleus
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| atomic number | number of protons in the nucleus of an atom
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| mass number | total number of protons and neutrons in atoms nucleus
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| periodic table | arrangement of elements
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| chemical symbol | abbreviation for an elements name
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| average atomic mass | atom is the weighed average of masses of all the naturally occuring isotopes of that element
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| metals | elements that are shiny and conduct heat and electricity
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| nonmetals | poor conductors of heat and energy
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| metalloids | some properties of metals and nonmetals
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| group | vertical line in the periodic table
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| period | horizontal row of elements on 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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Created by:
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