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 Language of Chemistry 40 Flashcards |
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What is the symbol for oxygen? |
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O |
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Which of the following elements has a symbol derived from its Latin name? A) K B) Cl C) O D) Na |
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D) Na |
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Riddle: I am a charged particle formed by losing electrons, and I carry a positive charge. What am I? |
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Cation |
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True or False: The valency of an element can be a fraction. |
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False. Valency is always a whole number. |
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A compound is formed when two or more elements combine in a ______. |
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Fixed ratio |
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What is defined as the outermost shell of an atom? |
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Valence shell |
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Which of the following statements is true regarding chemical equations? A) They represent reactions using only names. B) They show the physical states of reactants. C) They cannot be balanced. D) They represent reactions using symbols and formulas. |
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D) They represent reactions using symbols and formulas. |
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Fill in the blank: An ion with a negative charge is known as an ______. |
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Anion |
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True or False: The law of conservation of mass states that matter can be created in a chemical reaction. |
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False. Matter cannot be created or destroyed in a chemical reaction. |
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What is the chemical formula for water? |
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H₂O |
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Which of the following is an example of a compound? A) O₂ B) H₂O C) Na D) Cl |
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B) H₂O |
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Riddle: I combine with oxygen to create a gas that is vital for life, and I have one atom in my formula. What am I? |
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Hydrogen (H₂) |
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Fill in the blank: The ability of an element to combine with other atoms is called its ______. |
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Valency |
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What does a chemical formula indicate about a compound? |
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It shows the elements present and the number of atoms of each element. |
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True or False: An unbalanced equation has an equal number of atoms of each element on both sides. |
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False. An unbalanced equation has an unequal number of atoms on each side. |
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What is the significance of using '+' in a chemical equation? |
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It separates reactants or products. |
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Which of the following elements shows variable valency? A) Oxygen B) Hydrogen C) Copper D) Sodium |
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C) Copper |
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Fill in the blank: The process of balancing a chemical equation follows the ______. |
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Law of conservation of mass |
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What do we call a group of atoms that act as a single unit with a charge? |
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Radical |
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Which of the following correctly describes valency? A) The ability of an element to conduct electricity B) The number of hydrogen atoms an element can combine with C) The mass of an element D) The temperature at which a substance melts |
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B) The number of hydrogen atoms an element can combine with |
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