Sodium + sulfur → _________________________________
1.2 Copper + chlorine → _________________________________
1.3 Calcium + oxygen → _________________________________
1.4 Silver + bromine → _________________________________
1.5 Zinc + fluorine → _________________________________
1.6 Lithium + nitrogen → _________________________________
1.7 Aluminium + oxygen → _________________________________
1.8 Magnesium + bromine → _________________________________
1.9 Sulfur + oxygen → _________________________________
1.10 Carbon + oxygen → ___