Question

learning target
i can identify patterns on the periodic table and use them to predict properties of elements
4a. which element would be more electronegative, potassium (k) or calcium (ca)? justify your choice by discussing how the periodic table is arranged and the patterns that can be observed. (2 points)
is more electronegative. this is because it is located in group and has an atomic number of. having a atomic number means that it has protons in the nucleus. the difference in nuclear charge leads to attraction of the electrons to the nucleus, increasing electronegativity.

Explanation:

Step1: Recall periodic - table trends

Electronegativity increases across a period from left to right. Potassium (K) is in group 1 and calcium (Ca) is in group 2, and they are in the same period (period 4).

Step2: Analyze nuclear charge

Calcium has an atomic number of 20 and potassium has an atomic number of 19. A higher atomic number means more protons in the nucleus.

Step3: Determine electronegativity

More protons lead to a stronger attraction of electrons to the nucleus, increasing electronegativity.

Answer:

Calcium (Ca) is more electronegative. This is because it is located in group 2 and has an atomic number of 20. Having a higher atomic number means that it has more protons in the nucleus. The difference in nuclear charge leads to a stronger attraction of the electrons to the nucleus, increasing electronegativity.