Atoms
weak acid pH
what is a pH of 5-6.9?
500 POINTS!!!!
responsible for the surface of the water on a penny being slightly curved at the edges
what is surface tension?
mixture of water and salt
what is homogeneous?
more OH- ions
what is a base?
effect the speed of a reaction
what are enzymes?
charge of an electron
what is negative?
TRIPLE POINTS!!!
in chemical reactions, atoms are
what are rearranged?
mixture that is not uniform throughout
what is heterogeneous?
more H+ ions
what are acids?
DAILY DOUBLE!!!
term used to describe the energy needed to get a reaction started
what is activation energy?
DAILY DOUBLE!!!
atoms of the same element with the same number of protons but a different number of neutrons
what are isotopes?
loss or gain of electrons
what is an ionic bond?
H2O...element or compound
what is a compound?
pH of a very strong acid
what is close to zero?
the process that changes one set of chemicals into another set of chemicals
what is a chemical reaction?
the space surrounding the nucleus of an atom contains
what are electrons?
sharing of electrons
what is a covalent bond?
water molecules are polar, with the oxygen side being slightly negative and the hydrogen side being slightly _________
what is positive?
substance that speeds up a chemical reaction
what is a catalyst?
the substances that are formed
what are products?
the three subatomic particles of an atom
what are protons, neutrons and electrons?
one atom of oxygen and two atoms of hydrogen
what is a water molecule?
when salt is dissolved in water, water is called the
what is a solvent?
a substance with a pH of 12
what is a strong base?
the substances on the left side of a chemical reaction
what are reactants?