Multiple Choice
Why was Mendeleev's periodic table widely accepted by the scientific community?
30
views
2. Atoms & Elements
Periodic Table: Classifications
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which pair of elements is most likely to share similar chemical properties?
A
Na and K
B
O and Cl
C
Mg and Al
D
C and F
Verified step by step guidance1
Understand that elements in the same group (vertical column) of the periodic table tend to have similar chemical properties because they have the same number of valence electrons.
Identify the groups of each element in the pairs: Na (Sodium) and K (Potassium) are both in Group 1 (alkali metals); O (Oxygen) is in Group 16 and Cl (Chlorine) is in Group 17; Mg (Magnesium) is in Group 2 and Al (Aluminum) is in Group 13; C (Carbon) is in Group 14 and F (Fluorine) is in Group 17.
Recall that elements in the same group have similar valence electron configurations, which largely determine their chemical behavior and reactivity.
Compare the pairs: since Na and K are both alkali metals with one valence electron, they are most likely to share similar chemical properties.
Conclude that the pair Na and K is the best choice because they belong to the same group and thus have similar chemical properties.
2:40mWatch next
Master Periodic Table Classifications with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Periodic Table: Classifications practice set
Problem sets built by lead tutorsExpert video explanations