atomic # 55

name: Cesium

atomic mass: 132.905

Atomic # 56

name:Barium

Atomic mass: 137.327

atomic # 57

Name: Lanthanum

atomic mass:  138.906

atomic #72

name: hafnium

atomic mass: 178.49

Atomic# 73

Name: Tantalum

atomic mass: 180.95

Atomic # 74

Name: Tungsten

atomic mass: 183.84

atomic# 75

Name: Rhenium

Atomic mass: 186.207

atomic# 76

name: osmium

atomic mass: 190.23

atomic # 77

name: iridium

atomic mass: 192.217

Atomic#78

name: platinum

atomic mass: 195.078

Atomic # 79

name: gold

atomic mass: 196.967

Atomic# 80

Name: mercury

atomic mass: 200.59

Atomic # 81

Name: Thallium

atomic mass: 204.383

atomic#82

Name: lead

Atomic Mass: 207.2

Atomic# 83

Name: Bismuth

Atomic mass: 208.980

Atomic#84

Name: Polonium

Atomic Mass: {209}

Atomic # 85

Name: Astatine

Atomic mass: {210}