Free Periodic Properties and Trends MCQs with Answers
606 Periodic Properties and Trends MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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606 questions · page 20 of 31
- A. Group 1
- B. Group 18
- C. Group 4
- D. Group 14
Explanation: The elements corresponding to peaks in the graph of atomic volume versus atomic weight typically belong to Group 1, the alkali metals.
Correct answer: Group 1- A. S2- < P3- < Cl- < K+
- B. Cl- > S2- > P3- > K+
- C. K+ > Cl- > S2- > P3-
- D. P3- > S2- > Cl- > K+
Explanation: The correct order of ionic radii is P3- > S2- > Cl- > K+. The size of an ion is affected by its electron count and nuclear charge.
Correct answer: P3- > S2- > Cl- > K+- A. C > N > F > O
- B. C > N > O > F
- C. F > O > N > C
- D. N > C > O > F
Explanation: As you move across a period from left to right in the periodic table, atomic volumes generally decrease due to the increasing nuclear…
Correct answer: C > N > O > F- A. Neon
- B. Argon
- C. Krypton
- D. Xenon
Explanation: The ions Sc3+, Ca2+, and K+ all lose electrons to achieve a noble gas electronic configuration.
Correct answer: Argon- A. F-
- B. Cl-
- C. Br-
- D. I-
Explanation: The size of an ion generally increases as you move down a group in the periodic table because additional electron shells are added.
Correct answer: F-- A. I
- B. Cl
- C. Br
- D. F
Explanation: Fluorine (F) is the most electronegative element in the periodic table, which means it has a strong tendency to gain electrons rather than…
Correct answer: F- A. Li
- B. Be
- C. B
- D. C
Explanation: The electropositivity of an element is related to its ability to donate electrons and form positive ions.
Correct answer: Li- A. F-
- B. O2-
- C. Na+
- D. Ca2+
Explanation: Neon has an atomic number of 10, meaning it has 10 electrons. The ions F-, O2-, and Na+ all have electron configurations of 10 electrons…
Correct answer: Ca2+- A. Li+ < Na+ < K+ < Rb+
- B. Li+ > Na+ > K+ > Rb+
- C. Li+ = Na+ = K+ = Rb+
- D. Rb+ > Na+ > K+ > Li+.
Explanation: The correct order of ionic radii for alkali metal ions is Li+ < Na+ < K+ < Rb+.
Correct answer: Li+ < Na+ < K+ < Rb+- A. Na
- B. K
- C. Li
- D. Ca
Explanation: The correct answer is Li. Lithium is the strongest reducing agent in aqueous solution due to its high hydration energy.
Correct answer: Li- A. CO2
- B. CO
- C. BeO
- D. N2O5
Explanation: The correct answer is N2O5 because it is an acidic oxide that forms nitric acid when dissolved in water.
Correct answer: N2O5- A. Mg
- B. Rb
- C. Li
- D. Ca
Explanation: The first ionization energy is the energy required to remove the outermost electron from a gaseous atom.
Correct answer: Rb- A. K>Ca>Ba
- B. Ca>Ba>K
- C. Ba>K>Ca
- D. K>Ba>Ca
Explanation: The second ionization energy is the energy required to remove a second electron from an atom.
Correct answer: K>Ca>Ba- A. NR+
- B. O
- C. F
- D. O-
Explanation: The correct answer is option C: F. Fluorine has the highest electron affinity among the elements listed.
Correct answer: F- A. Cl
- B. Cl+
- C. Cl-
- D. Cl3+
Explanation: The size of an atom or ion depends on its electron configuration. Adding electrons (as in Cl-) increases repulsion between electrons and…
Correct answer: Cl-- A. Ne
- B. F
- C. O2-
- D. Na+
Explanation: Ionization energy (IE) refers to the energy required to remove an electron from a gaseous atom or ion.
Correct answer: Na+397. Which of the following iso-electronic ions would require least energy for the removal of electron?
- A. Ca2+
- B. Cl-
- C. K+
- D. Ar
Explanation: The correct answer is Cl- because it is an anion with one extra electron compared to its neutral state, reducing the effective nuclear…
Correct answer: Cl-- A. Nitrogen has half-filled p-orbitals, which provide extra stability.
- B. Nitrogen atom is smaller in size than oxygen atom.
- C. Nitrogen contains fewer electrons than oxygen.
- D. Nitrogen is less electronegative than oxygen.
Explanation: The correct answer is that the ionization energy of nitrogen is higher than that of oxygen because nitrogen has half-filled p-orbitals.
Correct answer: Nitrogen has half-filled p-orbitals, which provide extra stability.- A. Alkali metals
- B. Halogens
- C. Transition metals
- D. Inert gases
Explanation: The correct answer is Inert gases. Inert gases, also known as noble gases, have a complete valence electron shell, making them very stable…
Correct answer: Inert gases- A. F
- B. I
- C. Br
- D. Cl
Explanation: Chlorine has the highest electron affinity among the halogens. While fluorine is more electronegative, its small size results in…
Correct answer: Cl