Ss2 chemisty second term examination
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What determines the polarity of a covalent bond?
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Which of the following compounds is an example of a substance that exhibits ionic bonding?
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What is the term for the attractive force between a hydrogen atom covalently bonded to a highly electronegative atom and another electronegative atom?
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Which type of chemical bond involves the sharing of electron pairs between atoms?
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What type of chemical bond involves the transfer of electrons between atoms?
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In a chemical equation, what do the coefficients represent?
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What is the term for a chemical reaction that releases heat energy?
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Which of the following factors can increase the rate of a chemical reaction?
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What is the substance that speeds up a chemical reaction without being consumed in the process?
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Which type of chemical reaction involves the combination of two or more substances to form a new compound
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What type of energy is released or absorbed during a chemical reaction?
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Which of the following is an example of an exothermic reaction?
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What is the term for the minimum amount of energy required for a chemical reaction to occur?
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In an endothermic reaction, what happens to the energy of the surroundings?
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What is the atomic number of an element?
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Which element is a metalloid?
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What is the trend of electronegativity as you move from left to right across a period in the periodic table?
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Which element is the lightest in the periodic table?
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What is the term for the vertical columns of elements in the periodic table?
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Which group of elements is highly reactive and readily loses one electron?
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Who is credited with the development of the periodic table?
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What is the basis for the arrangement of elements in the periodic table?
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Which group of elements is located in the far right column of the periodic table?
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What is the term for the horizontal rows of elements in the periodic table?
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What is the term for a substance that cannot be broken down into simpler substances by chemical means?
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6. Which of the following is an example of an element?
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What is the difference between a homogeneous and heterogeneous mixture?
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Which of the following is an example of a mixture?
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Which separation technique involves the removal of impurities from a liquid by forming crystals?
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Which technique is used to separate a mixture of two or more liquids that are immiscible?
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What is the smallest unit of matter that still retains the properties of an element?
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Which of the following is an example of a compound?
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What type of substance is a mixture of two or more elements that are chemically combined in a fixed ratio?
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What is the principle behind the separation of mixtures using chromatography?
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Which technique is used to separate a mixture of two liquids with different boiling points?
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What separation technique is used to separate a mixture of sand and water?
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The addition of water to calcium oxide leads to
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