In E–Z notational system, which of following group will gets the higher priority among the given

1. Atomic number rule: Give the priority order based on the atomic number of the first atom of the group. Atom with higher atomic number gets highest priority→ If first atoms atomic numbers are same then given the priority order in accordance to 2nd atoms atomic numbers.→ If 2nd atoms atomic number are same, then priority order is given in accordance to 3rd atoms atomic numbers.→ By this way we need to proceed along the carbon chain until we get the difference in atomic numbers and give the priority order as 1st and 2nd2) Atomic mass number rule (or) atomic weight ruleWhen you are unable to provide the priority order by using atomic number  rule then we need to give the priority order in accordance to atomic mass number rule.3) If you are unable to provide the priority order based on atomic number  rule and atomic weight rule then we need to give the priority order in accordance to the nature of bond.→ The triple bond gets more priority than double bond and double bond gets more priority than single bond.