ATOMIC THEORY AND SUBATOMIC PARTICLES

He proposed that matter is composed of vey small, spherical, indivisible particles called atoms.

He proposed the planetary model.

He said that atoms are chemically combine in simple, fixed, whole-number ratios to form compounds.

He proposed that matter is composed of tiny, indivisible particles they called atomos which means “uncutable” in Greek.

What do you call to the experiment of Ernest Rutherford?

Electrons have no predictable pattern and move in a region where electrons are likely to found called the electrons cloud.

He discovered the negatively charged components inside the atom through his experiments on cathode ray tubes.

It states that matter is composed of discrete units called atoms, as opposed to the obsolete notion that matter could be divided into any arbitrarily small quantity.

He concluded that the atom must contain a small, dense, positively charged region at its center, which he called the nucleus.