_______ is not a transition metal. (1) Np (2) Zr (3) Tc (4) Re

D-Block Elements

Zn, Hg, Sc, Cu, etc. are d-block elements but not transition elements.

• It is not a d-block element, neptunium (Np).
• It belongs to the periodic table’s actinoid series and is a radioactive chemical element.
• Np has an atomic mass of 93.
• The planet Neptune inspired the element’s name.
• Transition elements include zirconium (Zr), technetium (Tc), and rhenium (Re).

Physical Properties of Np

• Neptunium (237), like plutonium and uranium, is an alpha emitter, which refers to that as it breaks down, it releases a particle made of two neutrons and protons (same as a helium nucleus). After then, it changes into protactinium 233. (element 91).
• A uranium nucleus is bombarded by neutrons to create neptunium.
• Np 237, a key source of energy for space missions, is used as a target in research reactors to produce Plutonium 238.
• Neptunium 237, which is a fission product of americium 241, is also more common in nuclear waste as a combination with other fission products.

Summary:

_______ is not a transition metal. (1) Np (2) Zr (3) Tc (4) Re

The transition metal does not include Np. It belongs to the periodic table’s actinoid series and is a radioactive chemical element.