BSC 215 Chapter Notes - Chapter 2: Covalent Bond, Hydrogen Bond, Kinetic Energy
9 Feb 2017
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Single bond: line between the atoms, only pair is shared. Double bond: two electron pairs are shared, two lines between atoms. Nonpolar covalent: if the electrons are shared equally. Polar covalent: if the electrons are shared unequally. Electronegativity: some protons can attract electrons more than others. Electrons electronegativity generally increases from the bottom left to the upper right of periodic table. Dipole/polar covalent bond: molecules with such partially positive and negative ends. Hydrogen bond can form between a partially positive hydrogen atom and any partially negative nonmetal, reason why water has such a high surface tension. Urfa(cid:272)e te(cid:374)sio(cid:374): (cid:448)isi(cid:271)le (cid:858)fil(cid:373)(cid:863) o(cid:374) top of (cid:449)ater e(cid:454). Chemical reaction: any time chemical bonds are formed, broken, or rearranged, or electrons are transferred between two or more atoms. Reversible reaction: two arrows pointing in opposite direction. Potential energy: energy that is stored, ready to be released and used to do work.
