what happens to the chemical sodium bicarbonate when all the properties from the elements bond together
It sounds like you want to know how the properties of sodium bicarbonate are different from the properties of the elements that are chemically bonded to form it.
Sodium bicarbonate, whose IUPAC name is sodium hydrogen carbonate, has the chemical formula `NaHCO_3` .
It is a white solid ionic compound composed of the ions `Na^+` and `CO^3^-` . It's soluble in water and acts as a weak base in aqueous solution. It decomposes into sodium carbonate, water and carbon dioxide gas when heated above 50 C. It also produces `CO_2` gas when it reacts with an acid. It's used in baking because the carbon dioxide gas bubbles cause doughs and batters to rise.
The elements in sodium bicarbonate have the following properties:
Sodium (Na) is a soft, gray-silver solid metal that reacts vigorously in water. It forms a 1+ ion that's present in many ionic compounds. Due to its high reactivity it's not found in nature in its pure metallic form.
Hydrogen is found in nature as the gas `H_2` . It's the lightest gas in existence and is very reactive with oxygen. Hydrogen's reactivity is what caused the Hindenburg disaster of 1937.
Oxygen is found in nature as the gas `O_2` . It is a colorless, somewhat reactive gas that supports combustion and makes up approximately 20% of the atmosphere.
Compounds usually have very different properties than the elements from which they form.