Anatomy and Physiology Chapter 2 Questions
and Answers
ionic bond - ✅✅chemical bond created by the attraction between oppositely charged ions.
matter - ✅✅anything that has mass and occupies space
chemical symbol - ✅✅one or two letters that identify an element's name in English
trace elements - ✅✅14 elements that are present in the human body in minute amounts and account
for 0.02% of the body's mass
chemical elements - ✅✅substances that cannot be broken down into simpler form by ordinary
chemical means
atoms - ✅✅the smallest units of mater that retain the properties and characteristics of an element
nucleus - ✅✅region found at the center of an atom and that contains most of the atom's mass
(protons and neutrons)
electrons - ✅✅negatively charged particles
protons - ✅✅positively charged particles
neutrons - ✅✅center of an atom that contains positively charged protons and uncharged neutrons
atomic number - ✅✅number of protons in the nucleus of an atom; different elements have different
numbers
, chemical bonds - ✅✅forces that bind atoms of molecules and compounds together
free radical - ✅✅an atom or molecule a single unpaired electron in its outer shell
compound - ✅✅substance that can be reduced into two or more other substances by chemical
means
ion - ✅✅a particle that has a positive or negative electrical charge
electron shells - ✅✅groups of electrons that surround the nucleus of an atom
mass number - ✅✅
cation - ✅✅a positively charged ion
anion - ✅✅an ion that has a net negative charge (more electrons than protons)
covalent bond - ✅✅two atoms share one, two, or three pairs of electronics in the outer shell
hydrogen bond - ✅✅a weak bond that formes between any hydrogen atom (which is covalently
bound to a nitrogen or oxygen atom) and a nitrogen or oxygen with an unshared electron pair
chemical energy - ✅✅the energy contained in the internal structure of an atom or molecule and
released during a chemical reaction
acidic - ✅✅having a pH below 7
basic (alkaline) - ✅✅has a pH above 7; contains more OH- than H+
and Answers
ionic bond - ✅✅chemical bond created by the attraction between oppositely charged ions.
matter - ✅✅anything that has mass and occupies space
chemical symbol - ✅✅one or two letters that identify an element's name in English
trace elements - ✅✅14 elements that are present in the human body in minute amounts and account
for 0.02% of the body's mass
chemical elements - ✅✅substances that cannot be broken down into simpler form by ordinary
chemical means
atoms - ✅✅the smallest units of mater that retain the properties and characteristics of an element
nucleus - ✅✅region found at the center of an atom and that contains most of the atom's mass
(protons and neutrons)
electrons - ✅✅negatively charged particles
protons - ✅✅positively charged particles
neutrons - ✅✅center of an atom that contains positively charged protons and uncharged neutrons
atomic number - ✅✅number of protons in the nucleus of an atom; different elements have different
numbers
, chemical bonds - ✅✅forces that bind atoms of molecules and compounds together
free radical - ✅✅an atom or molecule a single unpaired electron in its outer shell
compound - ✅✅substance that can be reduced into two or more other substances by chemical
means
ion - ✅✅a particle that has a positive or negative electrical charge
electron shells - ✅✅groups of electrons that surround the nucleus of an atom
mass number - ✅✅
cation - ✅✅a positively charged ion
anion - ✅✅an ion that has a net negative charge (more electrons than protons)
covalent bond - ✅✅two atoms share one, two, or three pairs of electronics in the outer shell
hydrogen bond - ✅✅a weak bond that formes between any hydrogen atom (which is covalently
bound to a nitrogen or oxygen atom) and a nitrogen or oxygen with an unshared electron pair
chemical energy - ✅✅the energy contained in the internal structure of an atom or molecule and
released during a chemical reaction
acidic - ✅✅having a pH below 7
basic (alkaline) - ✅✅has a pH above 7; contains more OH- than H+
