PS.8.1.3 - Periodic Table

How are elements similar to those in the same group on the periodic table?

• • They have the same number of valence electrons.

• • They have the same number of electrons.

• • They have the same number of protons.

• • They have the same atomic mass.D.

    They have the same atomic mass.

Which choice best describes the properties of potassium (K), based on its position on the periodic table of elements?

• • a nonreactive metal

• • A highly reactive metal

• • A nonreactive nonmetal

• • A highly reactive nonmetal

Where are the most reactive metals located on the periodic table?

• • the uppermost complete row of the table

• • the rows at the bottom of the table connecting two sections

• • the column at the far left side of the table

• • the second column from the right side of the table

Elements in the periodic table of the elements are organized into columns and rows.
The columns are organized to show the

• similarities of the reactivity in groups.

• • number of neutrons in a column.

• • sum of atomic weights per column.

• • amount of radioactivity in each group.

Which characteristic of an element determines its placement in the periodic table?

• • mass

• • size

• • number of neutrons

• • number of protons

Which statement best explains how periods on the periodic table are organized?

• • increasing atomic number from left to right

• • increasing number of neutrons from left to right

• • decreasing number of electrons from left to right

• • decreasing atomic mass number from left to right

The table shows properties of several elements.
Which element would Element X most likely be grouped with on the periodic table?

• • calcium

• • chlorine

• • copper

• • potassium

Which pair of elements has the most similar properties?

• • Li and B

• • I and Ca

• • K and He

• • N and P

The physical properties of element X are shown in the table below.
Which most likely represents the identity of element X?

• • carbon (C)

• • copper (Cu)

• • iodine (I)

• • sulfur (S)

Where on the periodic table are you most likely to find elements that do not react with other elements?

• • group 1

• • group 17

• • group 18

• group 2