Chem 121 Exam 2 Certification Evaluation Tested Questions Full Solution Guide

CHEM 121 EXAM 2 CERTIFICATION EVALUATION TESTED QUESTIONS FULL SOLUTION
GUIDE
CHEM 121 EXAM 2 Questions and Answers Verified
Solutions Latest Update 2026/2027

Question:
molecular formula

Answer:
atoms actually present in the unit of a substance



Question:
structural formula

Answer:
shows how atoms are put together into molecules or "other"



Question:
2 types of bonding

Answer:
1. covalent - sharing of electrons; EX: nonmetals mostly; atoms share electrons to get to noble gas
configurations 2. ionic - not sharing, complete electron transfer; EX: salts and metals



Question:
coulomb's attraction and law

Answer:
force of attraction btwn positive or negative charges I(force) = K(constant) X Q1(+ charge) X Q2(-
charge)/R(distance of separation)



Question:

, polyatomic ions

Answer:
cluster of atoms with a charge



Question:
nomenclature

Answer:
naming elements, compounds, etc. starts with cation (+), then anion (-)



Question:
hydrated ionic compounds

Answer:
contain specific # of water molecules associated with each formula unit



Question:
naming molecular (covalent) bonds

Answer:
prefix / name of first element prefix / name of 2nd element / "-ide" at the end second element listed
should have higher electronegativity prefixes: mono - 1 hexa - 6 di - 2 hepta - 7 tri - 3 octa - 8 tetra -
4 nona - 9 penta - 5 deca - 10



Question:
electronegativity

Answer:
tendency of an atom to attract a bonding pair of electrons; increases from left to right & down to up



Question: