NY Chemistry Regents Exam Jan 2023
Which general trend is observed as the elements in Period 2 are considered from left to right? (1) Atomic mass decreases. (2) Melting point increases. (3) Electronegativity increases. (4) First ionization energy decreases.
Solution: As elements are considered from left to right on the period (row) on the Periodic Table, atomic mass will decrease, first ionization energy will increase, electronegativity will increase. Answer choice 3 is correct according to the regents key.
Answer choice 1 should be correct as well, however. We are not sure whether this is a mistake/typo on the test.