- Which element has the highest melting point?
A) Tungsten
B) Iron
C) Carbon
D) Titanium
Answer: C) Carbon
Explanation: Carbon, in its diamond form, has the highest melting point due to its strong covalent bonding network.
- Which of the following elements is a nonmetal?
A) Nickel
B) Selenium
C) Zinc
D) Gallium
Answer: B) Selenium
Explanation: Selenium (Se) is a nonmetal, whereas Nickel, Zinc, and Gallium are metals.
- Which of the following elements is an example of a p-block metal?
A) Iron
B) Zinc
C) Aluminum
D) Calcium
Answer: C) Aluminum
Explanation: Aluminum (Al) is a p-block metal, located in Group 13. Iron and Zinc are d-block, and Calcium is an s-block metal.
- Which of the following elements has the greatest tendency to form anions?
A) Lithium
B) Fluorine
C) Sodium
D) Magnesium
Answer: B) Fluorine
Explanation: Fluorine (F) has the highest tendency to gain electrons and form F⁻ anions due to its high electronegativity.
- Which of the following elements has the electron configuration [Ne] 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s²?
A) Strontium
B) Zirconium
C) Yttrium
D) Rubidium
Answer: A) Strontium
Explanation: The electron configuration corresponds to Strontium (Sr), which is in Group 2 and Period 5.
- Which of the following elements is a p-block element?
A) Sodium
B) Magnesium
C) Aluminum
D) Potassium
Answer: C) Aluminum
Explanation: Aluminum (Al) is a p-block element located in Group 13. Elements in the p-block have their valence electrons in p-orbitals.
- Which of the following statements is correct regarding the d-block elements?
A) They are also known as alkali metals.
B) They show variable oxidation states.
C) They are nonmetals.
D) They are noble gases.
Answer: B) They show variable oxidation states.
Explanation: d-block elements are transition metals, and they are known for showing variable oxidation states due to the availability of d-electrons for bonding.
- Which of the following is a property of noble gases?
A) High reactivity
B) Low ionization energy
C) High melting points
D) Complete outer electron shells
Answer: D) Complete outer electron shells
Explanation: Noble gases have complete outer electron shells, making them chemically inert and stable, with very low reactivity.
- Which of the following elements is a member of the halogen family?
A) Neon
B) Argon
C) Fluorine
D) Helium
Answer: C) Fluorine
Explanation: Fluorine (F) belongs to Group 17, known as the halogen family. These elements are highly reactive and form salts with metals.
- Which element in Group 1 has the lowest ionization energy?
A) Lithium
B) Sodium
C) Potassium
D) Cesium
Answer: D) Cesium
Explanation: Cesium (Cs) has the lowest ionization energy in Group 1 because it is located furthest down the group, where the outer electron is farthest from the nucleus, making it easier to remove.
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