Question

Name the elements prrsents in group 1b.

Answer 1

• Hydrogen (H, Z=1).
• Lithium (Li, Z=3).
• Sodium (Na, Z=11).
• Potassium (K, Z=19).
• Rubidium (Rb, Z=37).
• Cesium (Cs, Z=55).
• Francium (Fr, Z=87).