chapter 4 section 1 13cards
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| group | elements in the same vertical column of the periodic table (also called a family)
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| family | elements in the same vertical column of the periodic table (also called a group)
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| chemical symbol | a one or two letter representation of an element
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| proton | a small positively charged particle in the nucleus of an atom
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| neutron | a small particle in the nucleus of the atom with no electric charge
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| nucleus | the central core of an atom containing protons and usually neutrons
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| electron | a tiny negatively charged particle that moves around the nucleus of an atom
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| atomic number | the number of protons in the nucleus of an atom
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| valence electron | one of the electrons farthest away from the nucleus of an atom; these electrons are involved in a chemical reaction.
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| atomic mass | the average mass of one atom of an element
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| periodic table | a chart of the elements showing the repeating pattern of their properties
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| period | a horizontal roe of elements in the periodic table
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| atomic mass unit (AMU) | a unit used to measure the mass of particles in atoms (a proton or neutron has a mass of 1 AMU)
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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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