Reimer Atoms and Periodic Table Study Guide - 8th
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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| matter | anything that has mass and takes up space
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| atom | small particle that makes up most types of matter and is made up of smaller particles called protons, neutrons and electrons
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| law of conservation of matter | states that matter is neither created nor destroyed, only changed in form
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| electron | negatively charged particle only changed in form
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| nucleus | central part of the atom
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| proton | positively charged, heavy particle contained in the nucleus of all atoms
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| neutron | neutral particle that is present in the nucleus of all atoms (has the same mass as the proton)
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| element | a substance that can not be broken down into smaller substances
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| electron cloud | region surrounding the nucleus of an atom
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| atomic number | number of protons in the nucleus of an atom; whole number that tells how many protons are in the nucleus of each atom of an element
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| atomic mass | number of neutrons plus the number of protons in the nucleus of an atom
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| isotope | atoms of the same element that have different numbers of neutrons in the nuclei
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| radioactive decay | release of nuclear particles and energy from unstable atomic nuclei
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| half-life | time needed for one-half the mass of a sample of a radioactive isotope to decay; can vary from fractions of a second to billions of years
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| periodic table | a chart in chemistry that lists the elements in order on increasing atomic number
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| period | a horizontal row on the periodic table
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| group (or family) | a vertical column on the periodic table
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| metal | element that is a good conductor of electricity and heat, is usually a solid at room temperature and usually is shiny, ductile, and malleable
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| non-metal | element that is a poor conductor of heat and electricity and may be a gas or a brittle solid at room temperature
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| metalloid | element that shares some properties with metals and nonmetals
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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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