1. It is a tool used to predict the physical and chemical properties of elements,

A. periodic table

C. periodic trends

B. atomic mass

D. none of these

2. The amount of energy required to remove an electron is called

A. electronegativity

C. metallic property

B. ionization Energy

D. nonmetallic property

3. The vertical columns in the periodic table are called

A groups

B. elements

C. periods

D. none of these​