Iron accounts for about 86% of the Earth's core and Silicon is next at only 6%. Iron is by far the most abundant element in the Earth's core.
Answer:
Ligands
Explanation:
Ligands are small molecules that transmit signals in between or within cells. Ligands exert their effects by binding to cellular proteins called receptors.
<span> an analytical method used to separate colored chemicals or substances.</span>
The answer is: a. The number of sodium ions is equal to the number of formula units of salt.
Balanced chemical equation: Na⁺ + Cl⁻ → NaCl.
Formula unit is the representative particle of an ionic compound. It is lowest whole number ratio of ions in an ionic compound, for sodium chloride it is NaCl.
In this chemical equation one sodium cation and one chlorine anion form one sodium chloride formula unit.