Chemistry, 02.09.2019 06:20, missymiss4273

What is the trend in effective nuclear charge for elements on the periodic table?
it decreases across a period but is constant down a group.
it increases across a period but is constant down a group.
it is constant across a period but decreases down a group.
it is constant across a period but increases down a group.

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What is the trend in effective nuclear charge for elements on the periodic table?
it decrease...