What do you mean I don’t understand this I could help but don’t understand
Answer: 1. 5
2H202 -> 2H2O + O2 ; 2 + 2 +1 = 5
Answer:
d
Explanation:
Aluminium and Indian are in the same group/family
Sodium and Sulfer are in the same period
Elements of the same family have similar properties
Since sulfur and sodium aren't in the same family they dont share properties
