Which is true of transition metals when moving from left to right on the periodic table?

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.

Which suspect most likely committed the robbery and how do you know

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?