Nickel in [Ni(CO)4] undergoes sp3 hybridization as it forms four sigma bonds with CO ligands.

Sodium (Na) has an atomic number of 11.

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-).

In Cr2O7^2-, chromium has a common oxidation state of +6.

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

Group 17 elements, also known as halogens, commonly exhibit an oxidation state of -1.

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

The common oxidation state of group 13 elements, such as Aluminum, is +3.

Transition metals commonly exhibit a +2 oxidation state due to the loss of two 4s electrons.

The coordination number is determined by the number of ligands attached to the central metal ion. In [Co(NH3)6]Cl3, there are six NH3 ligands, so the coordination number is 6.

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

Deforestation increases CO2 levels in the atmosphere as fewer trees are available to absorb carbon dioxide.

Chromium has an electron configuration of [Ar] 4s1 3d5 due to stability from half-filled d-orbitals.

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

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

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

The element with atomic number 12 is Magnesium (Mg) with the configuration 1s2 2s2 2p6 3s2.

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.

The formula of the compound formed between magnesium and chlorine is MgCl2.

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

The melting points of alkali metals generally decrease as you move down the group due to the increase in atomic size and decrease in metallic bonding strength.

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