In CrO3, chromium has a primary oxidation state of +6.

Group 14 elements typically exhibit a +4 oxidation state in their compounds.

In KMnO4, manganese has an oxidation state of +7.

In MnO4-, manganese has an oxidation state of +7.

In sulfuric acid (H2SO4), sulfur has an oxidation state of +6.

Ozone is a key component of photochemical smog, formed by the reaction of sunlight with pollutants like nitrogen oxides.

The primary product of the reaction between hydrogen and oxygen is water (H2O).

The primary product of the reaction between hydrogen and oxygen is water (H2O).

The primary products of the reaction between magnesium and dilute hydrochloric acid are magnesium chloride (MgCl2) and hydrogen gas (H2).

The color of transition metal complexes arises from the presence of unpaired electrons and the crystal field splitting of d-orbitals.

The color of transition metal compounds arises from the presence of unpaired electrons and d-d transitions.

Alkali metals have low ionization energy, which contributes to their high reactivity.

Halogens are highly reactive because they have a strong desire to gain one electron to achieve a stable octet.

The reactivity of alkali metals increases down the group due to decreasing ionization energy.

Ionic compounds are primarily held together by ionic bonding.

Barium sulfate is primarily used as a contrast agent in X-ray imaging.

Boron is primarily used in glass production due to its ability to improve thermal and chemical resistance.

Calcium is primarily used in the production of cement.

Chlorine is primarily used as a disinfectant in water treatment.

Hydrogen is primarily used in fuel cells for energy production.

Potassium is primarily used as a fertilizer in agriculture.

Silicon is primarily used in the semiconductor industry.

Sodium bicarbonate is used in baking, medicine, and cleaning.

CFCs are known to deplete the ozone layer, leading to increased UV radiation reaching the Earth's surface.

Biomagnification refers to the increasing concentration of harmful substances in organisms at each trophic level of the food chain.

Global warming refers to the gradual increase in the Earth's average temperature due to human activities, primarily the emission of greenhouse gases.

Photosynthesis is the process by which plants absorb carbon dioxide (CO2) from the atmosphere and convert it into glucose.

Photosynthesis is the process by which plants absorb carbon dioxide and convert it into glucose and oxygen using sunlight.

Bioaccumulation refers to the process by which pollutants accumulate in the tissues of living organisms.

Recycling is the process of converting waste materials into reusable materials.