This is sulfur its atomic number is 16 Its whats in your bullets when you shoot a gun! Which we call it Gunpowder! Sulfur is very abundant you can easily find if your mining! But be careful it might explode! Its melting point is 239.4°F (115.2°C).
Chlorine is a chemical element with symbol Cl and atomic number 17. Chlorine is in the halogen group and is the second lightest halogen following fluorine. Its melting point is 150.7°F (-101.5°C) .
Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon's melting point is 308.8°F (-189.4°C).
Potassium is a chemical element with symbol K and atomic number 19. Elemental potassium is a soft silvery-white alkali metal that oxidizes rapidly in air and is very reactive with water. It has no melting point!
Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, and is the fifth-most-abundant element by mass in the Earth's crust. Calcium also doesn't have a melting point.