chemistry facts to know
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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| Who founded the first periodic table? | Demitri Mendelaev
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| What is the periodic law? | When elements are organized in increasing atomic number there is a periodic repetition of chemical and physical properties
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| How are elements arranged on the periodic table? | In increasing atomic number
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| The properties of metal are what? | malleable, Ductle, good conductors, low ionization energy, low Electro-Negetaivity
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| What are the properties of Non-metals? | Brittle, Bad Conductors, Non-Lustrous, Exist in all 3 phases of matter
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| Name of Group 1 on periodic table | Alkali Metals
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| Name of Group 2 on periodic table | Alkaline Metals
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| Name of Group 17 on periodic table | Halogens
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| Name of Group 18 on periodic table | Noble Gases
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| Which groups of elements are so reactive that they are not found as a free element in nature? | Groups 1 , 2 and 17
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| What is the most reactive metal on the periodic table? | Francium
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| What is the most reactive non-metal on the periodic table? | Fluorine
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| What is the Definition of an Allotrope? | An element existing in different molecular forms while remaining in the same phase. They have different chemical and physical properties.
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| Which group of elements is found in the uncombined state in nature? | Group 18
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| Which element can only be formed from electolysis of its compounds? | Fluorine
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| Why are positive Ions smaller than negative? | Positive ions have a stronger internal magnet holding the electrons in closer to the nucleus.
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| Define an electrolyte | A substance that ionizes in water and conducts electricity
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| What two factors affect the strength of the electrical conductivity of a compound? | 1.) Concentration of the solution 2.) Degree of ionization
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| Why do compounds conduct electricity? | Compounds conduct electricity because they have mobile ions
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| Define dissociation | Action of water on ionic solids to produce hydrated ions
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| Properties of an acid | - Corrosive - taste sour - form electrolytes - caustic
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| properties of a base | - slippery feel - taste bitter - form electrolytes - caustic
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| How do you name simple acids? | Hydro_ic acid
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| How do you name acids containing polyatomic ions? | "ite" ---> "ous" "ate" ---> "ic"
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| What occurs in a neutralization reaction? | Acid + Base ----> Salt + Water
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