what happened to it during persian period?
At the end of the time of Darius I, the Great Sinai was part of the Persian province of Abar-Nahra, which means 'beyond the river
Sinai Peninsula
At the end of the time of Darius I, the Great (521–486 BCE) Sinai was part of the Persian province of Abar-Nahra, which means 'beyond the river [Euphrates]'.

Cambyses successfully managed the crossing of the hostile Sinai Desert, traditionally Egypt's first and strongest line of defence, and brought the Egyptians under Psamtik III, son and successor of Ahmose, to battle at Pelusium. The Egyptians lost and retired to Memphis; the city fell to the Persian control and the Pharaoh was carried off in captivity to Susa in Persia.
mercury is good or bad conductor of heat Bad conductor of heat what is this bad conductor? It is a chemical element with the symbol Hg and atomic number 80 what are its physical characteristics? It  is a heavy, silvery-white liquid metal, it has a freezing point of −38.83 °C and a boiling point of 356.73 °C, upon freezing, the volume of mercury decreases by 3.59% and its density changes from 13.69 g/cm when liquid to 14.184 g/cm when solid, solid mercury is malleable and ductile and can be cut with a knife. what is this aforesaid point mentioned? The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor what is its role as a reference of a compoud? The normal boiling point can serve as an indication of that compound's overall volatility what is its temperature saturation level? Saturation temperature means "boiling point", the saturation temperature is the temperature for a corresponding saturation pressure at which a liquid boils into its vapor phase what is the historical account behind the aforesaid element? Mercury was found in Egyptian tombs that date from 1500 BC what is known about this mentioned country? Egypt,  officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia by a land bridge formed by the Sinai Peninsula what is this peninsula? The Sinai Peninsula or simply Sinai is a peninsula in Egypt, and the only part of the country located in Asia. where is it located? It is situated between the Mediterranean Sea to the north and the Red Sea to the south, and is a land bridge between Asia and Africa.
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Sinai Peninsula [SEP] Achaemenid Persian Period
At the end of the time of Darius I, the Great (521–486 BCE) Sinai was part of the Persian province of Abar-Nahra, which means 'beyond the river [Euphrates]'. Cambyses successfully managed the crossing of the hostile Sinai Desert, traditionally Egypt's first and strongest line of defence, and brought the Egyptians under Psamtik III, son and successor of Ahmose, to battle at Pelusium. The Egyptians lost and retired to Memphis; the city fell to the Persian control and the Pharaoh was carried off in captivity to Susa in Persia.