In the nuclear equation: 222 86 Radon becomes 4 2 Helium plus blank.

The characteristics of the missing particle are .

Z = 84, A = 220

Z = 88, A = 218

Z = 84, A = 218

Z = 85, A = 220

It maybe because uranus is made of gas but uranus has a solid core in the middle

Answerthe global climate during the paleogene departed from the hot and humid conditions of the late mesozoic era and began a cooling and drying trend which dispite having been periodically disrupted by warm periods such as the paleocene-eocene thermal maximum, persists today;