8th Grade NC Chemistry Unit
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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| Which scientist discovered a pattern to the elements in 1869? | Dmitri Mendeleev
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| What does the word 'periodic' mean? | happens at regular intervals
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| These elements are shiny, ductile,malleable, and good conductors | Metals
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| These elements are also called 'semiconductors.' | Metalloids
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| Horizontal row of elements | Period
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| Verticle column of elements | Group
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| This group of elements has 1 electron in their outer shell. They are very reactive. | Alkali metals, Group 1
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| This group of elements are very reactive nonmetals. They have 7 electrons on their outer shell. They are salt producers. | Halogens
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| Name for the electrons on the outer energy level of an atom. | Valence electrons
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| This type of bond forms from the transfer of electrons from one atom to another. | Ionic bond
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| This type of bond forms from the sharing of electrons between two atoms. | Covalent bond
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| These are formed when atoms loose or gain electrons | Ions
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| Any substance with a defined composition is called what? | Chemical
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| These chemicals can be found in nature and are created by natural processes. | Natural chemicals
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| These chemicals are not found in nature and are not made by natural processes. | Synthetic chemicals
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Created by:
Ziemba
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