An element's atomic mass does not include the mass of its what

Electrons

Explanation:

Atomic mass does not include the weight of the atoms electrons. This is because the weight of an electron is so small, even if it was added to the overall mass it would make very little to no difference.

d. stage 4

explanation:

the existence of some kind of demographic transition is widely accepted in the social sciences because of the well-established historical correlation linking dropping fertility to social and economic development.[1] scholars debate whether industrialization and higher incomes lead to lower population, or whether lower populations lead to industrialization and higher incomes. scholars also debate to what extent various proposed and sometimes inter-related factors such as higher per capita income,lower mortality, old-age security, and rise of demand for human capital are involved.[2]

no it is not. kenya allows smoking weed.