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30 Cards in this Set
- Front
- Back
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What is the most reactive metal on the periodic table? |
Caesium |
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The density of the substance ___________ changes. |
Never |
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Number of valence electrons in elements in the halogen group. |
Seven |
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A chemical reaction produces 923g of methane gas and 12g of water. What is the mass of the reactants? |
935 grams of reactants |
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What is an ion? |
An atom with a negative charge. |
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A homogeneous mixture where one part is dissolved in the other. |
Colloid |
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What color do bases turn the litmus paper? |
Blue |
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Identify the chemical properties of matter |
Flammability, reactivity with oxygen, reactivity, combustibility, heat transfer and smell |
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Coefficient |
The only number you can alter in an equation to show the Law of Conservation of Mass. |
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Sand mixed in water is a _____________ mixture. |
Heterogeneous |
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Elements located in group 2 of the Periodic Table are what type of element? |
Alkaline earth metals |
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What is the most reactive non-metal on the Periodic Table? |
Fluorine |
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Lithium and Bromine will form what type of bond? |
Ionic Bond |
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What is the most abundant gas in the atmosphere? |
78% nitrogen |
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What occurs when acids and bases come in contact with each other? |
A neutralization reaction |
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What are the items on the right side of the periodic table? |
Products |
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What is the chemical formula for a diatomic molecule of oxygen?
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O_2 |
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An atom loses 3 valence electrons when forming a bond. What type of bond does it take on? |
Ionic Bond |
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What is endocytosis? |
A change in matter that absorbs energy
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What is the 2nd most abundant gas? |
Oxygen with 20.95% |
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What two tools would you need to determine the density of an irregularly shaped item? |
Water and a graduated cylinder or beaker |
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How does the size of each atom increase moving across the periodic table? |
Moving from right to left then down |
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How does the reactivity increase as you move across the table? |
As you move away from carbon |
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What separates the metals from the metalloids? |
The zig zag line down the middle |
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What happens to the periodic table with the oxidation number? |
As you move across the groups the oxidation number is plus the last digit in the group number. |
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What happens to the stability of the periodic table as you move across it? |
Noble gases are always stable and the less valence electrons needed to complete the outer shell the more stable the atom |
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What are trends within periods of the periodic table? |
They are the rows of the Table and as you move across the period the atomic radius decreases. |
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List 5 chemical changes and explain why they are chemical changes: |
*Flammability- color change, smell *Decomposition- smell, and possibly a gaseous substance *Combustion- gas, color change * |
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List 5 chemical changes and explain why they are physical changes:
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*freezing- liquid to a solid *melting- solid to a liquid *boiling water- liquid to a gas *sublimation- a solid straight to a gas *malleability- ability to be smashed into thin sheets * |
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What is the formula for density? |
D=M/V |
