Modern periodic law states that properties of elements repeat in a regular pattern when the elements are arranged in order of increasing . 1 - density
2 - atomic number
3 - atomic mass
4 - periodicity

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane