Question

which statement about atoms of elements in the same group of the periodic table is true?
groups
they share the same number of valence electrons.
they share the same number of neutrons.
they share the same number of protons.

Explanation:

• Valence electrons: Elements in the same group have the same number of valence electrons. This determines their chemical properties.
• Neutrons: Different elements (even in the same group) have different numbers of neutrons as they have different atomic masses.
• Protons: Each element has a unique number of protons (atomic number). Elements in the same group have different atomic numbers.

Answer:

They share the same number of valence electrons.