Physical Science Eighth Grade, Quiz on types of molecular bonding
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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| Symbols and subscripts used to show the number of atoms of different elements in a compound are called a ____. | chemical formula
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| Why do atoms form chemical bonds? | Atoms gain, lose, or share electrons to have 8 in their outer energy level. (2 for Hydrogen and Helium)
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| The force that hold atoms together in a compound | chemical bond
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| Atoms with a positive or negative charge | ions
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| The type of molecule formed when electrons do not share electrons equally, so that it has positive and negative ends. | polar molecule
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| Formed by covalent compounds (example: H2O) | molecule
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| Formed by sharing electrons | covalent bond
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| Forms between nonmetals only | covalent bond
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| Formed by transfer of electrons, making positive and negative atoms | ionic bond
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| Form crystals of repeating 3-D patterns between + and – ions | ionic bond
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| Formed by all atoms of the same element | metallic bond
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| How many Hydrogen atoms in NH4OH? | 5 (add the 4 from H4, plus the last H)
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| How many Oxygen atoms in MgSO4 • 7H2O? | 11 (There are 7 molecules of water, plus the 4 in the first compound)
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| How many Nitrogen atoms in Hg(NO3)2? | 2 (multiply the N(1) by the subscript 2)
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| Be able to show ionic and covalent bonds with Lewis electron dot structures. | See review sheet and notes!!!
Electron dot diagrams should be at the top of each family on your periodic Table!
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