It doesn't say much for God's competence if he doesn't know the difference between Silicon and Magnesium.
There are a lot of real changes in a body when it dies. Do you know the difference betw cells and chemical reactions in a dead body compared to a live one? Here are a few.
"
This means that analysis of metabolites from body fluids can provide insights into the changing biochemical environment post-mortem.
2]. Antemortem blood pH is regulated to stay within the narrow range of 7.35 to 7.45. If the blood pH is alkaline (greater than 7.45) or acidic (less than 7) this can lead to death [
3] so blood pH is one of the most regulated systems in the body. Blood pH is regulated by acid-base buffers such as carbonic acid and biocarbonate ion, which exert their influence principally through the respiratory system and the kidneys in order to control the acid-base balance [
3]. In death, the body buffering system is not maintained and blood pH changes can occur [
4].
5]. In the same study, blood collected from rat corpses showed a pH decrease from 7.35 at antemortem to 5.5 by 96 hours post-mortem.
6]. In the only recent study of lactate concentration in blood post-mortem, lactate in human heart blood increased 20-fold by one hour after death and 50-70 fold by 24 hours [
2].
7] following catabolism of several amino acids including serine, glycine, histidine, and tryptophan [
8] as well as catabolism of methanol from external sources such as diet [
9]. In humans formate is rapidly oxidised to carbon dioxide by the liver [
9], to prevent toxic effects in the brain and eyes due to an inhibition of the cytochrome oxidase a protein complex in the respiratory chain in mitochondria [
10]. In the only study carried out to date, the concentrations of formate are elevated in the blood of putrefied (5-44 days) post-mortem human cases (5 mmol.L-1) compared to non-putrefied (1-14 days) post-mortem human cases (0.86 mmol.L-1) [
11]. It was suggested that the reason for this increase was bacterial action on decomposition of lipids and proteins [
11]."
Biochemistry Changes That Occur after Death: Potential Markers for Determining Post-Mortem Interval
The act of creating a new body for Lazarus basically involved a lot of fast changes. Much greater than just a change between Silicon and Magnesium.