The bond angle in water (H2O) is approximately 104.5 degrees.

The complex ion [Cu(H2O)6]2+ is blue due to d-d transitions.

[Cu(H2O)6]2+ is known to exhibit a blue color due to d-d transitions in the presence of water ligands.

The common oxidation state of actinides in their compounds is +4.

Alkali metals have a common oxidation state of +1.

Chromium commonly exhibits a +6 oxidation state in chromates (CrO4^2-).

Chromium commonly exhibits a +6 oxidation state in compounds such as chromium trioxide (CrO3).

In ammonia, nitrogen has an oxidation state of -3.

The coordination number of the central metal ion (Co) in [Co(NH3)6]Cl3 is 6.

The electron configuration of potassium (K) is 1s² 2s² 2p⁶ 3s¹.

The electron configuration of magnesium (Mg) is 1s² 2s² 2p⁶ 3s².

The electronic configuration of potassium (K) is 1s² 2s² 2p⁶ 3s¹.

The electronic configuration of Lanthanum (atomic number 57) is [Xe] 6s2.

The complex formed is Ag(NH3)2+, which is known as the diamminesilver(I) ion.

Magnesium reacts with oxygen to form magnesium oxide, which has the formula MgO.

Ionization energy generally increases across a period due to increasing nuclear charge.

The geometry of the complex ion [Cu(NH3)4]2+ is square planar.

[Ni(CN)4]2- has a square planar geometry due to the presence of 4 ligands around the nickel ion.

The geometry of [Ag(NH3)2]+ is linear due to the coordination number of 2.

In [Ni(CO)4], the nickel ion undergoes sp3 hybridization to accommodate four CO ligands.

Greenhouse gas emissions, particularly carbon dioxide and methane, are the primary drivers of global warming.

CFCs and halons are the primary substances responsible for the depletion of the ozone layer.

Deforestation reduces the number of trees that can absorb CO2, leading to higher atmospheric levels.

Ozone is a major component of smog, particularly in urban areas during sunny days.

The main component of the gas used in hydrogen fuel cells is hydrogen.

Water gas is primarily composed of hydrogen (H2) and carbon monoxide (CO).

Acid rain leads to the corrosion of buildings and monuments, as well as harming aquatic ecosystems.

Chlorofluorocarbons (CFCs) are primarily known for their role in ozone layer depletion.

The main industrial method for producing hydrogen is steam reforming of natural gas.

The main products of the electrolysis of water are hydrogen gas (H2) and oxygen gas (O2).