CEM 141 MSU EXAM 3 ACTUAL TEST PAPER 2026 QUESTIONS AND SOLUTIONS GRADED A+

CEM 141 MSU EXAM 3 ACTUAL TEST PAPER
2026 QUESTIONS AND SOLUTIONS
GRADED A+

●● Left Side Electrons.
Answer: have weaker attractions to remove electrons
*easier to remove electrons from the left side of the table than the right
side*


●● Does it take MORE or LESS energy to remove an electron from Li
than from Na?.
Answer: MORE
Why? Because as we move down a group, the orbitals become larger
and weaker. While going across the effective nuclear charge increases.
(holds onto the electrons tighter)


●● Big Bang evidence.
Answer: universe is expanding (red shift)


●● Where do atoms come from?.
Answer: The Big Bang


●● What were elements formed by?.

, Answer: Nuclear reactions


●● Chemical reactions.
Answer: involve rearrangements of valence electrons
*the element undergoing a chemical reaction does not ever change*


●● Ionization energies are affected by.
Answer: -size of an atom
-size of positive charge


●● Periodic Trends.
Answer: -small atoms have higher ionization energies
-they are inversely related


●● Atomic Radius Decreases ----> Ionization energy increases.
Answer: when the radius decreases, it pulls the electrons closer.
decreasing the size of an atom


●● Nuclear Reactions.
Answer: Fusion and Fission


●● Fusion.