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11 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Non metals |
Found in groups 14-18. Do not conduct electricity and heat and are brittle, do not reglect light thereforw appear dull. At room temp most are gases, bromine is a liquid. |
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Metalloids |
Found between metals and non metals. The properties are a combo of those of metals and non metals. The "staircase" |
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Halogens |
Found in group 17. Have 7 electrons in their outer shell. Known for their capacity to react with metals to form salts. Very effective for cleaning and sterilising because of their effects on bacteria and fungi |
'Salt forming'. Eg fluorine and chlorine |
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Noble gases |
Found in group 18. 8 electrons in the outer shell except for helium which has 2. Gases at room temp., unchanged if mixed with other elements. Very unreactive. |
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Cations |
Metals form cations when they lose electrons to achieve a full, stable valency shell. |
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Anions |
Non metals form anions when they gain electrons to achieve a full stable valency shell. |
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Ionic compounds |
Positive cations are attracte to negative anions and form ionic compounds. |
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What forms a charged ion |
Polymatomic ions forn when two or more atoms combine to form a charged ion. |
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Electrons moving |
Number of protons do not change even when electrons move. If an atom gains a negative electron the charge of the atom becomes negative. If it loses electrons then it has a positive charge. The aton is then referred to as an ion. |
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Ionic bonds |
The bonds formed when ions interact |
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Polyatomic ions |
A no. Of ions are made up of more than one atom. These clusters have a charge because the total no. Of protons does not equal the total no. Of electrons present. |
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