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Science unit 8
Terms in this set (13)
A chemical bond that forms when 2 atoms share e-
A group of atoms that are neutral and covalently bonded= molecule
A molecular compound?
A compound made up of molecules
4 facts about covalent bonds?
-Weaker than ionic bonds
-Low melting and boiling points
-Most are liquid and gas
-Does not conduct electricity
2 bonded fluorine atoms; when two atoms share two pairs of electrons
How do molecular compounds come to have a slight electrical charge?
Atoms of some elements pull more strongly on shared electrons than do atoms of other elements, as a result, the electrons are pulled more toward one atom, causing the bonded atoms to have a slight electrical charges
electrons are shared unequally
How are electrons shared in a nonpolar covalent bond?
How can a molecule be nonpolar overall and still contain polar bonds?
attractions cancel out bc, they're in opposite directions
Water molecules are polar?
Why do polar and nonpolar molecules have different properties?
differences in attractions between their molecules
a group of symbols that shows how much of each element is in a compound
Tells you the ratio of elements in a compound
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