Vocabulary
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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electron | negatively charged particles.
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nucleus | a small, dense center that has a positive charge and is surrounded by moving electrons.
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proton | Positively charged particles in the nucleus.
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neutron | uncharged particles.
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electron cloud | electrons move within an area around the nucleus.
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atomic number | the number of protons in the nucleus of an atom.
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mass number | the total number of protons and neutrons in an atoms nucleus.
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periodic table | Mandeleevs arrangement of the elements.
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chemical symbol | is an abbriviation for the elements name.
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average atomic mass | of an atom weighted average of the masses of all the naturally occuring isotopes of that element.
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metal | are elements that are shiny and conduct heat and electricity.
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nonmetal | are poor conductors of heat and electricity.
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metalloid | are elements that have some properties of metals and some properties of nonmetals.
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group | vertical column of elements on the periodic table.
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period | each horizontial 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.
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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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