Question

storyline 1 exam
which pattern(s) may be observed from the arrangement of elements in the periodic table? select all that apply
□ increasing number of protons
□ similarity in their physical and chemical properties
□ increasing relative abundance on earths surface
□ similarity in the number of their valence electrons

Explanation:

• Increasing number of protons: Elements in the periodic table are arranged in order of increasing atomic number (number of protons).
• Similarity in physical and chemical properties: Elements in the same group (vertical column) have similar physical and chemical properties.
• Similarity in the number of valence electrons: Elements in the same group have the same number of valence electrons.
• Increasing relative abundance on Earth's surface: This is not a pattern in the periodic table arrangement. Relative abundance varies and is not directly related to the periodic table order.

Answer:

• increasing number of protons
• similarity in their physical and chemical properties
• similarity in the number of their valence electrons