CHEMISTRY Part IV

Elements in the same vertical group of the periodic table have same

• Number of valance electrons

• Atomic number

• Atomic mass

• Atomic volume

Which of the following always increases on going from top to bottom in group

• Metallic character

• Electronegativity

• Oxidizing power

• Tendency to get reduced

An element having low value of ionization energy and low value of electron affinity is likely to belong to

• Group IA

• Group IB

• Group VIIA

• Group VIII

Best position of hydrogen in periodic table in IA is mainly due to

• Both are electropositive

• Similar outermost electronic configuration

• Both form ionic compounds

• All

Ionization energy depends upon

• Nuclear charge

• Shielding effect

• Atomic size

• All

Higher value of electron affinity means

• Atom will loose electrons easily

• Atoms will gain electron easily

• Atom may form dipositive ion

• The reason is unknown

Which one is true for a given atomic size

• Mg>Sr

• Ba>Mg

• Lu>Ce

• Cl>I

The atomic radii decreases by increasing atomic number in

• Alkali metal

• Alkaline earth metal

• Elements from Li to Ne

• Halogens

The atoms of same element having same atomic number but different mass number are

• Isobars

• Isomers

• Isotopes

• Isotones

The total numbers of s electrons in Cu++ ion is

• 5

• 6

• 8

• 9