Atomic radius increases down a group due to the addition of electron shells.

The atomic radius increases as you move down the group of alkali metals.

Electronegativity increases from left to right across a period.

Ionization energy decreases as you move down the group in s-block elements due to increased atomic size.

Ionization energy decreases down the group for alkali metals.

Metallic character decreases from left to right across a period.

S-block metals typically form ions with a charge of +2.

The central sulfur atom in SF6 undergoes sp3d2 hybridization.

[Fe(CN)6]3- exhibits d2sp3 hybridization due to the octahedral arrangement of ligands.

In [Ni(CN)4]2-, nickel has a coordination number of 4 and uses dsp2 hybridization.

[Ni(CO)4] has a tetrahedral geometry, which corresponds to sp3 hybridization.

[Ni(CN)4]2- has a square planar geometry, which corresponds to dsp2 hybridization.

[Co(en)3]Cl3 shows optical isomerism because it has chiral centers due to the bidentate ligand ethylenediamine (en).

Geometric isomerism occurs due to different arrangements of ligands around the central metal ion.

[Co(en)3]3+ exhibits optical isomerism because it has chiral centers due to the bidentate ligand ethylenediamine (en).

The isomerism shown by [Co(NH3)5Cl]Br is coordination isomerism, where the composition of the complex changes.

[Cr(en)3]3+ shows optical isomerism because it has chiral centers due to the bidentate nature of the ethylenediamine (en) ligands.

Coordination isomerism occurs when the composition of the coordination sphere differs, as seen in this complex.

Beryllium (Be) is the least reactive alkaline earth metal.

Barium is the most reactive alkaline earth metal due to its larger atomic size and lower ionization energy.

Beryllium is the least reactive alkaline earth metal due to its high ionization energy.

Strontium is used in fireworks to produce a red color.

Strontium is used in fireworks to produce a red flame.

Strontium is used in fireworks to produce red colors.

Chlorofluorocarbons (CFCs) are primarily responsible for ozone depletion in the stratosphere.

Chlorine is commonly used to disinfect drinking water and kill harmful bacteria.

Chlorofluorocarbons (CFCs) are primarily responsible for ozone depletion in the stratosphere.

Chlorofluorocarbons (CFCs) are responsible for the depletion of the ozone layer, as they release chlorine atoms that destroy ozone molecules.

Thorium (Th) is used in nuclear reactors due to its ability to breed fissile uranium-233.

Chlorofluorocarbons (CFCs) are primarily responsible for the depletion of the ozone layer.