7th Grade Midterm Review Chemical Building Blocks Terms 2014-2015
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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| Protons | positively charged parts of an atom
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| electrons | negatively charged parts of an atom
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| neutrons | neutrally charged parts of an atom
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| periodic table | a chart which lists all of the known elements
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| Atom | The smallest unit of an element, the building block for all matter
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| Physical Change | The change in a substance that does not change its identity. ex: tearing paper
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| Volume | the amount of space that matter occupies. V=M/D. Units - cm3 or mL
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| Solution | A well-mixed mixture. ex: Kool Aid
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| Mass | a measure of how much matter is in an object. M=DxV. Units - gm
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| Element | a substance that cannot be broken down into other substances by chemical or physical means
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| Weight | the measure of the force of gravity on an object
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| Compound | a substance that is made of two or more elements that are chemically combined
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| Chemical Change | a change in which one or more substances combine or break apart to form new substances
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| Mixture | two or more substances that are mixed, but not chemically combined
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| Molecule | a combination of two or more atoms
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| Density | the measurement of how much mass is contained in a given volume. D=M/V. Units - gm/cm3
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| Reactivity | DECREASES across periods from left to right. Group 1 are MOST reactive. Group 18 are NONreactive
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| Magnetic properties | DECREASE across periods from left to right. METALS are on the LEFT side of the PT, NON METALS are on the RIGHT side of the PT
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| Group/Family | The elements down the columns of the PT; they share similar properties.
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| Periods | The elements across the rows of the PT; their properties change in a predictable pattern.
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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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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:
bphelan
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