Answer:
a
barium
b
calcium
e
aluminum
f
magnesium
g
copper
Forms cation
Explanation:
Different forces between atoms and difference in structure.
At STP, 1 mole of hydrogen can occupy a volume of 22.4 liters. At STP, 3 moles of hydrogen can occupy a volume of 2×22. 4=44. 8 liters
