ECU CHEM 1120 Exam 2 Review – Chemistry Test Preparation & Study Materials
Chemical Bond - ANS ✔✔attractive force that holds atoms together in more complex units
(compounds)
group V111A(18) - ANS ✔✔do not form bonds "most happy"
Ionic bond - ANS ✔✔high melting points above 500 c
conduct electricity
ions
transfer electrons
Covalent Bonds - ANS ✔✔low melting points below 500 c
don't conduct electricity
molecules
sharing of electrons
Ionic compounds - ANS ✔✔metal and nonmetal
Covalent compounds - ANS ✔✔nonmetals only
Ions - ANS ✔✔an atom( or group of atoms) has an electrical charge as a result of the loss or gain
of electrons
-do not have equal numbers of electrons and protons: therefore they have a charge
cations - ANS ✔✔positive ions
, anions - ANS ✔✔negative ions
+ charge - ANS ✔✔positive ions
- charge - ANS ✔✔gained electron
octet Rule - ANS ✔✔in compound formation, atoms will lose, gain or share electrons until they
have eight in their outer most shell
ionization energy - ANS ✔✔energy required to remove one electron from a single atom in a
gaseous state
-low IE favors cation formation
Electron affinity - ANS ✔✔energy released on adding an electron to a single atom in a gaseous
state
- High EA favors anion formation
isoelectronic species - ANS ✔✔elements before and after a noble gas form ions by gaining or
losing electrons until they have the same electron configurations the noble gas
Alkali Metals - ANS ✔✔lowest Ionization energy and lose an electron easily
Halogens - ANS ✔✔highest electron affinity and gain electron easily
Noble gases - ANS ✔✔neither gain nor lose and electron easily and have high ionization energy
and low electron affinity values
ionic compounds - ANS ✔✔metal and nonmetal ions
Chemical Bond - ANS ✔✔attractive force that holds atoms together in more complex units
(compounds)
group V111A(18) - ANS ✔✔do not form bonds "most happy"
Ionic bond - ANS ✔✔high melting points above 500 c
conduct electricity
ions
transfer electrons
Covalent Bonds - ANS ✔✔low melting points below 500 c
don't conduct electricity
molecules
sharing of electrons
Ionic compounds - ANS ✔✔metal and nonmetal
Covalent compounds - ANS ✔✔nonmetals only
Ions - ANS ✔✔an atom( or group of atoms) has an electrical charge as a result of the loss or gain
of electrons
-do not have equal numbers of electrons and protons: therefore they have a charge
cations - ANS ✔✔positive ions
, anions - ANS ✔✔negative ions
+ charge - ANS ✔✔positive ions
- charge - ANS ✔✔gained electron
octet Rule - ANS ✔✔in compound formation, atoms will lose, gain or share electrons until they
have eight in their outer most shell
ionization energy - ANS ✔✔energy required to remove one electron from a single atom in a
gaseous state
-low IE favors cation formation
Electron affinity - ANS ✔✔energy released on adding an electron to a single atom in a gaseous
state
- High EA favors anion formation
isoelectronic species - ANS ✔✔elements before and after a noble gas form ions by gaining or
losing electrons until they have the same electron configurations the noble gas
Alkali Metals - ANS ✔✔lowest Ionization energy and lose an electron easily
Halogens - ANS ✔✔highest electron affinity and gain electron easily
Noble gases - ANS ✔✔neither gain nor lose and electron easily and have high ionization energy
and low electron affinity values
ionic compounds - ANS ✔✔metal and nonmetal ions
