Life's Chemical Basis
Temperature
measure of molecular motion
Negative charge
more electrons than protons
Positive charge
more protons than electrons
Rank the following chemical bonds in order of increasing polarity: non polar covalent ionic polar covalent
non polar covalent polar covalent ionic
Atomic number
number of protons in nucleus
Atoms share electrons unequally in a(n) ____ bond.
polar covalent
Hydrophilic
polar, dissolves easily in water
All ions have at least one
proton
Hydrogen ions (H+) are ____
- in blood - protons - indicated by a pH scale
A salt does not release ____ in water
H+
When dissolved in water, a(n) _____ donates H+; a(n) _____ accepts H+.
acid, base
In the periodic table, the elements are arranged according to
atomic number
A ____ can help keep the pH of a solution stable.
buffer
Hydrogen bonds
collectively strong
The measure of an atom's ability to pull electrons away from another atom is called
electronegativity
What atom has only one proton?
hydrogen
pH
hydrogen ion concentration
A(n) ____ substance repels water.
hydrophobic
The mutual attraction of opposite charges holds atoms together as molecules in an _______ bond.
ionic
A ____ is disolved in a solvent.
solute
A molecule into which a radioisotope has been incorporated can be used as a ____
tracer
Hydrophobic
water hating
