Question

Given below is a table containing a few metals and nonmetals with exceptional properties. Fill the dark spaces by identifying X, Y and Z in the table.

• A. X - Carbon (C); Y - Non-metal; Z - Lustrous
• B. X - Gallium (Ga); Y - Metal; Z - Lustrous
• C. X - Gallium (Ga); Y - Metal; Z - Sonorous
• D. X - Silver (Ag); Y - Metal; Z - Ductile

Answer 1

The correct option is B X - Gallium (Ga); Y - Metal; Z - Lustrous

X- Gallium (Ga): Of all the metals in the periodic table, gallium (29.76 °C) and cesium (28.44 °C) have very low melting points that they can melt even at room temperature.
Y- Metal: Alkali metals (Li, Na, K) are so soft that they can be cut with a knife. They have a large atomic size and one valence electron. They have weak metallic bonding and are soft.
Z- Lustrous: Iodine is a non-metal but is lustrous in nature due to its low electronegativity.