77 (a)
The sum of atomic numbers on left hand side = the sum of atomic numbers on right hand side
The sum of mass numbers on left hand side = the sum of mass numbers on right hand side
Hence, the isotope X is
It is an isotope of calcium
(b)
The unusual stability of is due to magic number of protons. Number of protons in is 20 which is a magic number. Nuclei with magic number of protons (2,8, 20, 28, 50, 82 and 126) are exceptionally stable due to large energy gap between a series of filled energy level and next empty level,
(c)
Let Z be the atomic number of Livermorium.
The sum of atomic numbers on left hand side = the sum of atomic numbers on right hand side
Hence, the balanced equation is
-77. In 2002, a team of scientists from Russia and the United States reported the creation...