Holes Human Anatomy And Physiology
Matter - ANSWER Anything that has mass and takes up space
Elements - ANSWER Any of the fundamental chemical substances, each
characterized by a distince type of atom.
Compounds - ANSWER Substance composed of 2 or more chemically bonded
elements.
Atom - ANSWER Smallest particle of an element that has the properties of that
element.
An atom consist of - ANSWER Electrons surrounding a nucleus, which has protons,
and neutrons.
A complete atom is - ANSWER Electrically neutral
Atomic number - ANSWER Equal to the number of protons in each atom
Isotope - ANSWER Atom that has the same number of protons in its nucleus as
other atoms of that element but has a different number of neutrons.
All the isotopes of an element - ANSWER React chemically in the same manner
Some isotopes are - ANSWER Radioactive and release atomic radiation
Molecule - ANSWER Particle composed of 2 or more joined atoms
Molecular formula - ANSWER Abbreviation for the number of atoms of each
element in a compound
If atoms of the same element combine - ANSWER They produce molecules of that
element
If atoms of different elements combine - ANSWER They form molecules called
compounds
Ionic bond - ANSWER Chemical bond that results between 2 ions formed by
transfer of electrons; electrovalent bond.
Cations - ANSWER Atoms that lose electrons become positively charged
Anions - ANSWER Atoms that gain electrons become negatively charged
Covalent bonds - ANSWER Chemical bond formed by electron sharing between
atoms
, Polar - ANSWER A molecule with equal number of protons and electrons, yet
having a slightly positive region and a slightly negative region due to uneven
distribution of those charged particles.
Nonpolar - ANSWER equal sharing of electrons
Hydrogen bonds - ANSWER May form within and between polar molecules
Reactant - ANSWER A chemical that takes part in a chemical reaction. The starting
chemical
Products - ANSWER The result of a chemical reaction
Synthesis - ANSWER Building larger molecules by bonding smaller ones
Decomposition - ANSWER The breakdown of molecules
Exchange reactions - ANSWER 2 parts of 2 different molecules trade positions
Many reactions are - ANSWER Reversible
Catalyst - ANSWER Chemicals that increase the rate of a chemical reaction, but is
not permanently altered by the reaction.
Electrolytes - ANSWER Substances that ionize in a water solution
Acid - ANSWER Substance that ionizes in water to release hydrogen ions
Base - ANSWER Substance that ionizes in water, releasing hydroxide ions or other
ions that combine with hydrogen ions
Salt - ANSWER Compound produced by a reaction between an acid and a base
pH represents - ANSWER The concentration of hydrogen ions and hydroxide ions
in a solution
Solution with equal numbers of hydrogen and hydroxide ions - ANSWER Has a pH
of 7.0 and is neutral
Solution with more hydrogen ions than hydroxide ions - ANSWER Acidic pH less
than 7.0
Solution with more hydroxide ions than hydrogen ions - ANSWER Basic pH more
than 7.0
Difference in hydrogen ion concentration separates each whole number in the pH
scale - ANSWER A tenfold difference
Buffers - ANSWER Substance that can react with a strong acid or base to form a
weaker acid or base, and thus resist a change in pH
Matter - ANSWER Anything that has mass and takes up space
Elements - ANSWER Any of the fundamental chemical substances, each
characterized by a distince type of atom.
Compounds - ANSWER Substance composed of 2 or more chemically bonded
elements.
Atom - ANSWER Smallest particle of an element that has the properties of that
element.
An atom consist of - ANSWER Electrons surrounding a nucleus, which has protons,
and neutrons.
A complete atom is - ANSWER Electrically neutral
Atomic number - ANSWER Equal to the number of protons in each atom
Isotope - ANSWER Atom that has the same number of protons in its nucleus as
other atoms of that element but has a different number of neutrons.
All the isotopes of an element - ANSWER React chemically in the same manner
Some isotopes are - ANSWER Radioactive and release atomic radiation
Molecule - ANSWER Particle composed of 2 or more joined atoms
Molecular formula - ANSWER Abbreviation for the number of atoms of each
element in a compound
If atoms of the same element combine - ANSWER They produce molecules of that
element
If atoms of different elements combine - ANSWER They form molecules called
compounds
Ionic bond - ANSWER Chemical bond that results between 2 ions formed by
transfer of electrons; electrovalent bond.
Cations - ANSWER Atoms that lose electrons become positively charged
Anions - ANSWER Atoms that gain electrons become negatively charged
Covalent bonds - ANSWER Chemical bond formed by electron sharing between
atoms
, Polar - ANSWER A molecule with equal number of protons and electrons, yet
having a slightly positive region and a slightly negative region due to uneven
distribution of those charged particles.
Nonpolar - ANSWER equal sharing of electrons
Hydrogen bonds - ANSWER May form within and between polar molecules
Reactant - ANSWER A chemical that takes part in a chemical reaction. The starting
chemical
Products - ANSWER The result of a chemical reaction
Synthesis - ANSWER Building larger molecules by bonding smaller ones
Decomposition - ANSWER The breakdown of molecules
Exchange reactions - ANSWER 2 parts of 2 different molecules trade positions
Many reactions are - ANSWER Reversible
Catalyst - ANSWER Chemicals that increase the rate of a chemical reaction, but is
not permanently altered by the reaction.
Electrolytes - ANSWER Substances that ionize in a water solution
Acid - ANSWER Substance that ionizes in water to release hydrogen ions
Base - ANSWER Substance that ionizes in water, releasing hydroxide ions or other
ions that combine with hydrogen ions
Salt - ANSWER Compound produced by a reaction between an acid and a base
pH represents - ANSWER The concentration of hydrogen ions and hydroxide ions
in a solution
Solution with equal numbers of hydrogen and hydroxide ions - ANSWER Has a pH
of 7.0 and is neutral
Solution with more hydrogen ions than hydroxide ions - ANSWER Acidic pH less
than 7.0
Solution with more hydroxide ions than hydrogen ions - ANSWER Basic pH more
than 7.0
Difference in hydrogen ion concentration separates each whole number in the pH
scale - ANSWER A tenfold difference
Buffers - ANSWER Substance that can react with a strong acid or base to form a
weaker acid or base, and thus resist a change in pH
