Properties of elements

The number of energy levels occupied with electrons refers to the ................. number.

• period

• group

• atomic

Number of electrons in the outermost energy level refers to ................ number.

• atomic

• period

• group

The outermost energy level of all noble gases is filled with ................... electrons

• 6

• 8

• 10

all noble gases have their outermost energy level filled completely with 8 electrons except ....................

• Argon

• Hellium

• Neon

Elements of the same group have similar ................ properties.

• chemical

• physical

• biological

Elements in the same period have ................ number of energy levels.

• similar

• different

• no correct answer

Atomic size is determined by knowing ....................... of the elements

• atomic radius

• electronegativity

• both

Atomic radius is measured by a unit of .........................

• meter

• kilometer

• picometre

During a schemical reaction, metal atoms tend to

• lose electrons and change into negative ions

• gain electrons and change into positive ions

• lose electrons and change into positive ions

• gain electrons and change into negative ions

The lowest element in the metallic property is

• Na

• Cs

• K

• Li