Periodic Trends Answers

Click on the element in the periodic table to explore the atomic radii of elements from Period 3 and Group 17. Fill in the missing values in the table so you can compare the atomic radii of the elements. After the table is filled in, compare the values in each column.A = ⇒ 1.12

B = ⇒ 1.6

C = ⇒ 1.9

chlorine

Consider the elements bromine and chlorine; which element has a larger ionic radius?

Number the elements sodium, magnesium, and potassium in the predicted order of ionic radius from the largest (1) to the smallest (3). ⇒ 2 sodium

Consider the elements bromine and chlorine; which element has a higher ionization energy?

Number the elements sodium, magnesium, phosphorus, and chlorine in the predicted order ionization energies from the highest to the smallest. sodium

Click the button that shows the correct relationship of the electron affinities of the elements bromine and chlorine.

Use the periodic table to explore the electronegativities of elements from Period 3 and Group 17. Fill in the missing values in the table so you can compare the electronegativities of the elements. After the table is filled in, compare the values in each column. A = ⇒ 3.16

As you move from left to right across the periodic table, the size of atomic radii increases✔ decreases.

magnesium

magnesium

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus.

B = ⇒ 1.31

As you move from left to right across the periodic table, electronegativity ✔ increasesdecreases.

potassium

phosphorus

C = ⇒ 0.93

As you move from top to bottom within a group, the first ionization energy increases✔ decreases.