BJU 6th Science - Chapter 7
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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Chemistry | study of matter
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Atom | smallest piece of an element
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Element | substance containing only one kind of atom
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Nucleus | center section of an atom
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Proton | positive charge
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Neutron | no charge
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Atomic mass | sum of protons and neutrons
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Electron | negatively charged
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Shell | average distance of the electrons from the nucleus
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Atomic number | number of protons in an atom’s nucleus
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Atomic theory | scientists ideas about atoms
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Particle accelerator | atom smasher
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Chemical symbol | abbreviations for elements
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Periodic table of the elements | classification system
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Period | horizontal rows of periodic table
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Group | vertical columns of table
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Family | color coded groups on periodic table
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Molecule | atoms joined together
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Chemical reaction | a chemical change
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Compound | molecules produced by a reaction
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Chemical formula | symbols and numbers used to abbreviate a compound
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Closed | outer most shell of an atom is full
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Covalent bond | atoms sharing pairs of electrons
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Ion | atom that has gained or lost an electron
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Positive ion | an atom with fewer electrons than usual
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Negative ion | an atom with more electrons than usual
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Ionic bond | positive and negative ions attracted to each other
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Endothermic reaction | reaction that uses heat energy
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Exothermic reaction | reaction the produces heat
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Acid | form hydrogen ions when dissolved in water
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Base | form hydroxide ions when dissolved in water
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Alkali | bases that dissolve in water
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pH scale | “power of hydrogen”; numbered from 0-14
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indicator | changes color when exposed to acid or base
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neutral | pH of 7.0
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neutralize | when an acid and base combine and “cancel “each other out
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salt | ionic compound formed during a reaction with a base and an acid
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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:
MrsDunham
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