Question

Ch atomic structure and chemical bonding explain it

Answer 1

Answer:

John Dalton (1808) presented to his Dalton,s atomic theory.

Explanation:

Dalton's atomic theory:

1 - atoms are individual particles.

2 - atoms can neither be created nor destroyed.

3 - the atoms of the anecement are alike in all respects and differ from atoms of other elements .

Modern atomic theory :

1 - atoms are visible into sub particles such as protons ,neutrons and electrons .

2 - items can be created and destroyed by nuclear fusion and fission .

3 - the atoms of an element may not be alike in all respects ,as seen in the case of isotopes, isotopes are atoms of the same element with the same atomic number but different mass numbers .