If a cube of butter is heated sot that it becomes softer and drips out of the container ,it is an example of which change in state

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.

What does x represent in the formula for the compound xcl4?

What are fructose and glucose an example of?