Periodic Classification of Elements | Chapter Assessment | English | Grade 10

Which of the following set of elements is written in order of their increasing metallic character?

• Na Li K

• Mg Al Si

• Be Mg Ca

• As P N

Answer explanation

Metallic character decreases across a period and increases down a group. Therefore, in Be Mg Ca, metallic character increases.

Mendeleev’s basis for the Periodic Table is _______ .

• Atomic number

• physical properties

• Symbols

• Atomic masses

Answer explanation

Mendeleev’s basis for the Periodic Table is Atomic masses.

The basis for Modern Periodic Table is _____________ .

• Atomic masses

• Symbols

• Atomic number

• Physical properties

Answer explanation

The basis for Modern Periodic Table is atomic number.

Non-metals are located on the _________ side of the Modern Periodic Table.

• Right

• Left

• Centre

• Separate

Answer explanation

Non-metals are located on the right side of the Modern Periodic Table.

Isotopes belong to the same _________ in the Modern Periodic Table

• Group

• Position

• Period

• None

Answer explanation

Isotopes belong to the same position in the Periodic Table.