I think you answered your own question

The soul and body are inseperable. Upon death we cease to be a soul, but become as were were before God created us, that is, a mixture of Carbon, Silicon, and other elements which compose dust. As it says in Genesis 2:7, “And God formed man from the dust of the ground, and breathed into His nostrils the breath of life, and man became a living soul”. When we die, “then shall the dust return to the earth as it was, and the spirit (breath) shall return to God who gave it” Ecclesiastes 12:7. We cease to be a soul upon death. We did not exist before God created us. He formed us and breathed His breath of life into us. When we die, our body goes back to the dust, and God’s breath of life returns to Him, and it is as though we never existed.
At the Ressurrection, Jesus will call forth the dead, as He did Lazarus. Lazarus was dead four days, he had already began to decompose. When Jesus said, “Lazarus, come forth” He put Lazarus back together. The righteous dead and living will hear Jesus’ voice at the first ressurrection and come forth to eternal life. The wicked dead are raised for judgement a thousand years later. Then the wicked are cast into the lake of fire, which is the same as the pre-ressurrection state of the dead. As Jude tells us, Sodom and Gommorha are currently suffering the vengance of eternal fire (Jude 1:7).
God Bless!
-Servus
Some Scriptures to consider are Psalm 13:3, Isaiah 38:18-19. Job 7:21, Ecclesiastes 9:5-6, Psalm 22:29, Ezekiel 18:4, 1 Thess. 4:13-15, 1 Tim. 6:16