Unit 2: Periodic Table & Periodic Trends

The Russian scientist, Dmitri Mendeleev, noticed that by arranging the elements known at his time in order of increasing _______________, similarities in the chemical properties appeared at regular intervals.

What is the most active element in group 17?

How does an atom’s ability to attract electrons in a chemical compound change as you move left to right across period 4 from cobalt, Co, to bromine, Br?

Which element is the most electronegative?

Which of the following elements has the greatest electronegativity?

A measure of the ability of an atom to attract electrons from another atom in a chemical compound is called

a) c)

b) d)

Which of the following has the largest second ionization energy?

As you move across the second period of the periodic table, ________

Which of the following factors contributes to the increase in ionization energy going across the period from

left to right?

The energy required to remove an electron from an atom is called