Periodic Table and Periodicity - Real World Applications
Q. What is the primary reason for the increase in ionization energy across a period?
A.Increased nuclear charge
B.Decreased electron shielding
C.Increased atomic radius
D.Decreased electronegativity
Solution
As you move across a period, the nuclear charge increases while the shielding effect remains relatively constant, leading to higher ionization energy.
Correct Answer: A — Increased nuclear charge
Q. What is the primary use of aluminum in metallurgy?
A.Electrical wiring
B.Construction materials
C.Aerospace applications
D.All of the above
Solution
Aluminum is used in various applications including electrical wiring, construction materials, and aerospace due to its lightweight and corrosion-resistant properties.
Correct Answer: D — All of the above
Q. What trend is observed in atomic radius as you move down a group in the periodic table?
A.Increases
B.Decreases
C.Remains constant
D.Varies unpredictably
Solution
Atomic radius increases down a group due to the addition of electron shells.
Correct Answer: A — Increases
Q. Which of the following metals is most likely to undergo oxidation?
A.Gold
B.Platinum
C.Sodium
D.Copper
Solution
Sodium is highly reactive and readily loses an electron, making it likely to undergo oxidation.
