Which of the following statements regarding the trend of metallic properties in the modern periodic table is correct?

Correct option is A

The correct answer is (A) Metallic character decrease across a period and increase down a group.

• Explanation: Metallic character decreases from left to right across a period because it becomes more difficult for an element to lose valence electrons. This is because atoms more readily accept electrons to fill a valence shell than lose them. 
• Atomic size: Atomic size increases from top to bottom in a group as new electrons are added to a new shell. Atomic size decreases from left to right across a period because all electrons are added to the same shell. 
• Effective nuclear charge: The effective nuclear charge acting on the valence shell electrons increases across a period and decreases down the group.