Chem 103 Midterm 1 Exam Questions and Answers UW Madison 2026 Update

Chem 103



Chem 103 Midterm 1 Exam Questions and
Answers UW Madison 2026 Update
Monatomic -Correct Answer ✔-Lost or gained e-

Atomic # -Correct Answer ✔-Protons (electrons if stable)

Atomic mass -Correct Answer ✔-Protons and neutrons

Alaki metals -Correct Answer ✔-Group 1A, column (+1 charge)

Alkaline earth metals -Correct Answer ✔-Group 2A, column (+2 charge)

Halogens -Correct Answer ✔-Group 7A, column (-2 charge)

Nobel gases -Correct Answer ✔-Group 8A, column, (-1 charge)

Upper right of periodic table gains... -Correct Answer ✔-electronegativity and
ionization energy

lower left of periodic table gains... -Correct Answer ✔-Atomic radius

Polyatomic ions -Correct Answer ✔-Carry a net charge

Binary compounds -Correct Answer ✔-Consist of 2 non-metal elements

How to name binary compounds -Correct Answer ✔-1. name elements in formula
order
2. each word add a prefix to know # of atoms present
3. ad -ide to the end of the 2nd element

Name N2F4 -Correct Answer ✔-Dinitrogen Tetrafluoride


Chem 103

, Chem 103




Ammonium (+charge) -Correct Answer ✔-NH4+

Hydronium -Correct Answer ✔-H3O+

Hydroxide -Correct Answer ✔-OH-

Acetate -Correct Answer ✔-CH3COO-

Nitrate -Correct Answer ✔-NO3-

PERMANGANATE -Correct Answer ✔-MnO4-

Hydrogen Carbonate -Correct Answer ✔-HCO3-

Carbonate -Correct Answer ✔-CO3 -2

Hydrogen Sulfate -Correct Answer ✔-HSO4 -

Sulfate -Correct Answer ✔-SO4 2-

Phosphate (CHARGE) -Correct Answer ✔-PO4 3-

1u -Correct Answer ✔-1.6605x10^-27kg

percent abundance -Correct Answer ✔-# of atoms in an isotope over total # of
atoms of all isotopes of an element

Sample percent abundance equation: element Xi has 2 isotopes, 71 and 69. the
average atomic mass is 69.8. find the percent abundance of each isotope. -Correct
Answer ✔-Sample equation to solve:
Xi71(X) + Xi69(x-1) = 69.8. solve for x



Chem 103