Periodic Classification of Elements_Class X

Among noble gases, which noble gas forms maximum number of compunds

• He

• Ne

• Ar

• Xe

Which of the following is most metallic in nature?

• C

• N

• P

• Bi

Among the following, the atom with the smallest size is:

• C

• N

• O

• F

Which of the following metal shows similar properties with Magnesium

• Lithium

• Sodium

• Potassium

• Rubidium

Which among the following has the highest effective nuclear charge?

• C

• N

• O

• F

Which among the following has the least ionization energy?

• Lithium

• Sodium

• Cesium

• Magnesium

The atomic radius (covalent radius) of hydrogen atom is

• 37 micrometer

• 37 nanometer

• 37 picometer

• 37 femtometer

Which of the following atoms is biggest in atomic size

• Barium

• Calcium

• Magnesium

• Beryllium

The most abundant noble gas in earth's atmosphere is

• Helium

• Neon

• Argon

• Krypton

Element X forms a chloride with the formula XCl₂ , which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as

• Na

• Mg

• Al

• Si