Summary the modern atomic theory of the atom?

Answer 1

Modern Atomic Theory

1) Atoms are no longer considered indivisible

2) Atoms of same elements may have different atomic weights e.g. isotopes

3) Atoms of different elements may have same atomic weights e.g. isobars

4) The ration in which different atoms combine with one another may be fixed and integral but may not always be simple

5) Atom is smallest particle that takes part in chemical reaction

6) Atom is no longer indestructible

Dalton's Atomic Theory

1) Matter is made of extremely small indivisible particles called atoms

2) Atoms of same elements are identical in all aspects e.g. size, shape, and mass

3) Atoms of different elements have different masses, sizes, and different chemical properties

4) Atoms of the same or different elements combine together to form compound atoms now called molecules

5) When atoms combine with one another to form molecules, they do so in simple whole number ratios

6) An atom is the smallest part that takes place in a chemical reaction

7) An atom can neither be created nor destroyed

Answer 2

The atom is the smallest particle, which makes up all matter in the universe. The modern atomic theory is called the Quantum Model. This is an electron cloud model.

Answer 3

Electrons exist in atoms as "clouds".

Answer 4

That all matter is made up of atoms