Consider the nuclear equation below.

Superscript 235 subscript 92 upper U right arrow superscript 4 subscript 2 upper H e.

What is the nuclide symbol of X?
Superscript 231 subscript 94 upper P u.
Superscript 235 subscript 90 upper T h.
Superscript 239 subscript 94 upper P u.
Superscript 231 subscript 90 upper T h.

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)