PRE-UPS 2 SK015 2023/2024 (SET A)

NAME

PRACTICUM GROUP

MATRIC NUMBER

Halogens are found in which block of the periodic table?

• s block
• p block
• d block
• f block

Moving across a period, the atomic size ___________ because the ___________ increases.

• increases, effective nuclear charge
• decreases, effective nuclear charge
• increases, shielding effect
• decreases, shielding effect

What is an example of an isoelectronic species?

• ₁₁Na⁺ and ₁₄Si⁴⁺
• ₁₁Na⁺ and ₁₇Cl⁻
• ₁₂Mg²⁺ and ₁₃Al⁺
• ₁₆S²⁻ and ₈O²⁻

The equation for the second ionisation energy of a magnesium atom is:

• Mg(s) → Mg⁺(g) + e⁻
• Mg(g) → Mg⁺(g) + e⁻
• Mg⁺(s) → Mg²⁺(g) + e⁻
• Mg⁺(g) → Mg²⁺(g) + e⁻

As you move across a period, the outer electrons are ________ to the nucleus, so the nucleus of the atom is ________ to attract electrons in a bond. Hence, electronegativity _____________.

• closer, more able, increases
• further, less able, increases
• closer, more able, decreases
• further, less able, decreases

“Aluminium oxide can react either with sodium hydroxide or hydrochloric acid.” Based on the above statement, it can be concluded that aluminium oxide is ________.

• a basic oxide.
• an acidic oxide.
• a metalloid oxide.
• an amphoteric oxide.

Atom X's Lewis dot symbol represents ___________.

• Boron
• Carbon
• Nitrogen
• Oxygen