Which number is a combustion type of reaction 1. A + BC → AC + B
2. AB + CD → AD + CB
3. A + B → AB
4. AB → A + B
5. CH + O2 + CO2 + H2O
1
O 2
O 3
4
O 5

that's what i got you can count the number of atoms

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

they are all solids.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.