Question

1. circle the atom in each pair that has the greater electronegativity.

a) ca ga b) li o c) cl s d) br as e) ba sr f) o s

Explanation:

Electronegativity increases across a period (from left to right) and decreases down a group in the periodic table.

• For a) Ca and Ga: Ga is to the right of Ca in the periodic table.
• For b) Li and O: O is to the right of Li in the periodic table.
• For c) Cl and S: Cl is to the right of S in the periodic table.
• For d) Br and As: Br is to the right of As in the periodic table.
• For e) Ba and Sr: Sr is above Ba in the periodic table.
• For f) O and S: O is above S in the periodic table.

Answer:

a) Ga, b) O, c) Cl, d) Br, e) Sr, f) O