In Period 3, from left to right in order, each successive

element will

(1) decrease in electronegativity

(2) decrease in atomic mass

(3) increase in number of protons

(4) increase in metallic character

Here are some trends you should know.

Electronegativity increases as you go right and up along the periodic table.

So, (1) is wrong

Atomic mass increases as you go right and down along the periodic table.

So, (2) is wrong

Proton number or atomic number increases as you go right and down in the table.

So, (3) is correct

Metallic character increases as you go left and down along the periodic table.

So, (4) is wrong