The Greek philosophers Leucippus and Democritus first theorized about atoms. In fact, that's who named them atoms.
John Dalton, an English scientist, developed the atomic theory of matter in the early 19th century. His theory proposed that all matter is made up of tiny, indivisible particles called atoms, each with its own unique properties. Dalton's work laid the foundation for modern atomic theory and greatly influenced the field of chemistry.
John Dalton, an English school teacher and chemist, proposed the idea that everything is made of very small particles called atoms in the early 19th century. His atomic theory laid the foundation for modern chemistry.
J.J. Thomson discovered that cathode rays are made up of negatively charged particles. He conducted experiments using cathode ray tubes and found that the rays were deflected by electric and magnetic fields in a manner consistent with the presence of negatively charged particles.
The first European credited with the atomic theory of matter is John Dalton, an English chemist, and physicist. Dalton proposed his atomic theory in the early 19th century, stating that all matter is made up of tiny, indivisible particles called atoms.
Democritus did not do any experiments or provide solid evidence for his theory on the atom. In the 5th century B.C, Democritus proposed an atomic model in which all matter is made up of small indestructible units called atoms.
John Dalton, an English scientist, proposed that atoms were the smallest indivisible particles in the universe in the early 19th century. His atomic theory laid the foundation for modern chemistry.
Around 400 BC Democritus a Greek philosopher theorized that everything was composed of small indivisible particles he called atoms or "atomos".
The first scientist to question the idea that atoms were indivisible was John Dalton, an English chemist, in the early 19th century. Dalton proposed that atoms were not actually indivisible, as previously believed, but rather could be rearranged in chemical reactions.
John Dalton, an English scientist, developed the atomic theory of matter in the early 19th century. His theory proposed that all matter is made up of tiny, indivisible particles called atoms, each with its own unique properties. Dalton's work laid the foundation for modern atomic theory and greatly influenced the field of chemistry.
The Greek philosopher Leucippus, and his student Democritus, were among the proponents of a smallest indivisible portion of matter, around the 5th century BC. English chemist John Dalton (1766-1844) was the first to apply atomic theory to chemistry, explaining how and why elements and compounds interact as they do.
German scientist
Centries ago , a Greek philosopher , Democritus belived , that all matter was composed of extremely small particles to which he give the name Atomos meaning not to divide. During the early nineteeth centry an English scientist John Dalton , did some carefull experiment. His results convinced that atoms were not all alike .They differ in size , mass , and chemical behaviour , for example oxygen atoms are bigger and greater than hydrogen atoms.
Sovereignty was indivisible and rested ultimately with Parliament.
John Dalton. N.B.: John Dalton [born: September 6, 1776; died: July 27, 1844, at age 67] was an English chemist and physicist who claimed matter was made up of tiny particles and that these particles were identical for any given kind of matter. Moreover, he claimed these particles were indivisible and could neither be created nor destroyed in any chemical process, only be altered in the manner they were grouped.
The modern version of the Atomic Theory was developed by the English chemist John Dalton in the early 19th century. Dalton's theory proposed that all matter is made up of small, indivisible particles called atoms, each with its own specific properties.
John Dalton, an English school teacher and chemist, proposed the idea that everything is made of very small particles called atoms in the early 19th century. His atomic theory laid the foundation for modern chemistry.
who said that all substances are made up of atomsIt's actually Dalton, because it sayes so in my textbook for school.