Question

based on their locations on the periodic table, which set of elements has similar chemical properties?

o potassium (k), silicon(si), argon (ar)

o carbon (c), fluorine (f), calcium (ca)

o lithium (li), sodium (na), potassium (k)

o manganese (mn), magnesium (mg), molybdenum (mo)

Explanation:

Step1: Recall periodic table groups

Elements in the same group (vertical column) of the periodic table have similar chemical properties because they have the same number of valence electrons.

Step2: Analyze each option

• Option 1: Potassium (K) is in Group 1, Silicon (Si) in Group 14, Argon (Ar) in Group 18. Different groups, so different properties.
• Option 2: Carbon (C) in Group 14, Fluorine (F) in Group 17, Calcium (Ca) in Group 2. Different groups, different properties.
• Option 3: Lithium (Li), Sodium (Na), Potassium (K) are all in Group 1 (alkali metals). They have 1 valence electron, so similar chemical properties.
• Option 4: Manganese (Mn) in Group 7, Magnesium (Mg) in Group 2, Molybdenum (Mo) in Group 6. Different groups, different properties.

Answer:

O lithium (Li), sodium (Na), potassium (K)