Match the correct simple with the correct elements of safety

Read the given expression. x = number of protons − number of core electrons which of the following explains the identity of x and its trends across a period? x is the effective nuclear charge, and it remains constant across a period. x is the screening constant, and it remains constant across a period. x is the effective nuclear charge, and it increases across a period. x is the screening constant, and it increases across a period.

How many grams of n2h4 will be consumed by 23 g of n2o4

How have the greenhouse gasses increased from the year 2000 to 2018