ANSWER THE FOLLOWING QUESTIONS-
1.Write the short note on law of conservation of mass ?
2 .experimental demonstration of law of conservation of mass
3.what is atom ?
4.what is symbol ?
5. Who propose the symbol ?
6. Full form of IUPAC ?
Answers
Answer:
1).Answer:
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to th3e law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
2).Given Alka-Seltzer and a flask, students design and conduct an experiment to prove the Law of Conservation of Mass. The law of conservation of mass indicates that mass cannot be created nor destroyed. This means the total mass of reactants in a chemical reaction will equal the total mass of the products.
3).An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.
4).The symbol for an atom indicates the element via its usual two-letter symbol, the mass number as a left superscript, the atomic number as a left subscript (sometimes omitted), and the charge as a right superscript.
5.)John Dalton
John Dalton devised the first atomic symbols, but they looked a little different from the ones we use today. __1803: __English chemist-physicist John Dalton starts using symbols to represent the atoms of different elements.S
6).Nomenclature - IUPAC | International Union of Pure and Applied Chemistry.
Explanation:
above picture is for 4th question
