The Periodic Table

Question 1

Which of the following best explains why elements in the same group (vertical column) of the periodic table have similar chemical properties?

Accepted Answer

They have the same number of valence electrons.

Answer

All elements in a group are metals, so they react in the same way.

Answer

They have the same atomic mass.

Answer

They are in the same period, so they have the same number of electron shells.

Question 2

Which statement best explains a basic principle of the Mendeleev periodic table?

Accepted Answer

Elements in the same group have similar chemical properties

Answer

Elements in the same group have the same atomic number

Answer

Elements in the same period have similar chemical properties

Answer

Metals are located only on the left side of the periodic table

Question 3

Which statement correctly explains why the periodic table is organized into horizontal periods and vertical groups?

Accepted Answer

Elements in the same period have the same number of electron shells, while elements in the same group have the same number of valence electrons, giving them similar chemical properties.

Answer

Periods are arranged only to show a steady increase in atomic weight, and groups are used just to separate metals from non‑metals.

Answer

All elements in a period are metals, and all elements in a group are non‑metals, which is why the table is laid out that way.

Answer

Elements in the same period have the same number of valence electrons, while elements in the same group have the same number of electron shells.

Try three questions

Which of the following best explains why elements in the same group (vertical column) of the periodic table have similar chemical properties?

Which statement best explains a basic principle of the Mendeleev periodic table?

Which statement correctly explains why the periodic table is organized into horizontal periods and vertical groups?

Keep going on this shelf