Exam (elaborations)
SCI 220 Final Exam Questions And Answers Latest Update
- Course
- SCI 220
- Institution
- University Of Phoenix
SCI 220 Final Exam Questions And Answers Latest Update
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Solution 2024/2025Pepper
SCI 220 Final Exam Questions And Answers
Latest Update
applied vs. basic research ANS✔✔ applied = study for practical use of
knowledge; expect useful result
basic = study to increase knowledge; may not be practical
elements are defined by: ANS✔✔ number of protons = atomic number
what makes up almost all the volume of an atom? what makes up the most
mass? ANS✔✔ volume = electrons
mass = nucleus
Thompson model of the atom ANS✔✔
Rutherford model of the atom ANS✔✔
rules to remember when filling orbitals ANS✔✔ 2 electrons per orbital; 1
orbital in s, 3 orbitals in p, 5 orbitals in d, 7 orbitals in f subshell; follow
arrows on given chart
properties of metals/non-metals/noble gases ANS✔✔ metals = left side of
table; tend to lose electrons
non-metals = right side of table; tend to gain electrons
noble gases = very stable and have 8 valence electrons
, Solution 2024/2025
Pepper
positive ions vs. negative ions ANS✔✔ positive = cations; ion has same
name as element; transition metals need roman numeral to show charge on
ion
negative = anions; form from nonmetal elements; replace end of name with
-ide
ionic vs. covalent ANS✔✔ ionic = very strong; between to ions (cation and
anion); i.e. NaCl
covalent = electrons are shared; usually when both are not metals; diatomic
(H N F O I C B)
electronegativity and polar/nonpolar bonds ANS✔✔ electronegativity = pull
on electrons around nucleus; if they're really close -> covalent; if they're
not so close -> polar covalent; if they're far apart -> ionic
naming ionic compounds ANS✔✔ if anion is single element, name ends in -
ide (MgS = magnesium sulfide); transition metals need roman numerals;
use crossover method to ensure net zero charge
naming covalent compounds ANS✔✔ both parts nonmetal; positive charge
comes first; single atoms end in -ide; if more than one, use numerical
prefixes
aliphatic types ANS✔✔ alkanes = all single bonds; name always ends in -
ane
alkenes = at least one double bond; name ends in -ene; if more than one
double bond, ending becomes -diene (2), -triene (3), ...; cis- means
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