Tungsten has the highest melting point among the d-block elements due to its strong metallic bonding.

Osmium has the highest melting point among the given options due to its strong metallic bonding.

Carbon has a larger first ionization energy compared to the other elements listed.

K+ has the largest ionic radius among the given options.

Fluorine has the smallest atomic radius among the given elements.

Iron (Fe) is a d-block element as it has partially filled d-orbitals.

Fluorine is a halogen, found in Group 17 of the periodic table.

Plutonium is a member of the actinide series, which includes elements with atomic numbers 89 to 103.

Boron is classified as a metalloid in the p-block.

Boron is classified as a metalloid in the periodic table.

Helium is a noble gas, located in Group 18 of the periodic table.

Bromine is a p-block element as it is located in group 17 of the periodic table.

Uranium (U) is a part of the actinide series, which consists of elements with atomic numbers from 89 to 103.

Zinc is classified as a transition metal.

Sodium (Na) is an s-block element as it is in Group 1 of the periodic table.

Fluorine is a halogen and is found in Group 17 of the periodic table.

Sodium is in period 3 of the periodic table.

Potassium is an alkali metal and typically forms a +1 ion.

Sodium is an alkali metal and readily loses an electron to form a cation.

Aluminum is a metal, while silicon, boron, and germanium are metalloids.

Zinc (Zn) is not considered a transition metal because it does not have an incomplete d-subshell in its elemental state.

Plutonium is widely used in nuclear reactors and weapons due to its fissile properties.

Uranium is commonly used as fuel in nuclear reactors.

Carbon Dioxide is a major greenhouse gas that traps heat in the atmosphere, contributing to global warming.

Hydrogen gas is produced when aluminum reacts with hydrochloric acid.

Magnesium has the highest first ionization energy among the given elements.

Hydrogen gas (H2) is commonly used as a reducing agent in various chemical reactions.

Si4+ has the smallest ionic radius due to its high positive charge, which pulls the electrons closer.

Cu2+ ions are colored in solution due to d-d transitions.

Co2+ ions typically impart a green color to solutions due to d-d transitions.