4. What coefficients do you need to balance the following equation? CH4 + O2 + CO2 + H2O
O 1, 2, 1, 2
O 2, 1, 1, 1
O 1, 1, 1, 1
O 2, 1, 2, 2

2b2t

explanation:

2b2t

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.