Answer:
atom is the smallest indivisible particle of an element
Explanation:
The symbol of 20 element are H He li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca
element is the simplest pure form of a substance .
Body of knowledge gained using inquiry and expirimentation
Answer:
CN^- is a strong field ligand
Explanation:
The complex, hexacyanoferrate II is an Fe^2+ specie. Fe^2+ is a d^6 specie. It may exist as high spin (paramagnetic) or low spin (diamagnetic) depending on the ligand. The energy of the d-orbitals become nondegenerate upon approach of a ligand. The extent of separation of the two orbitals and the energy between them is defined as the magnitude of crystal field splitting (∆o).
Ligands that cause a large crystal field splitting such as CN^- are called strong field ligands. They lead to the formation of diamagnetic species. Strong field ligands occur towards the end of the spectrochemical series of ligands.
Hence the complex, Fe(CN)6 4− is diamagnetic because the cyanide ion is a strong field ligand that causes the six d-electrons present to pair up in a low spin arrangement.
<span>c.
reactivity
this is a physical property depends on how reactive something is</span>
