Question

which statement best describes how elements are grouped on the periodic table of the elements? elements within a period have the same number of electrons. all gases are grouped together elements within a group have similar properties. gases easily form compounds with other elements.

Explanation:

• In the periodic table, elements in the same group (vertical column) have similar chemical properties because they have the same number of valence electrons.
• Elements in a period (horizontal row) have the same number of electron shells, not the same number of electrons.
• Not all gases are grouped together. For example, hydrogen is a gas but is in group 1.
• Noble gases (a type of gas) are very stable and do not easily form compounds with other elements.

Answer:

Elements within a group have similar properties.