EVERYDAY SCIENCE

Detailed explanation-1: -Dalton proposed that every single atom of an element, such as gold, is the same as every other atom of that element. He also noted that the atoms of one element differ from the atoms of all other elements. Today, we still know this to be mostly true. A sodium atom is different from a carbon atom.

Detailed explanation-2: -Modern Atomic Theory (John Dalton) Experiments with gases that first became possible at the turn of the nineteenth century led John Dalton in 1803 to propose a modern theory of the atom based on the following assumptions. 1. Matter is made up of atoms that are indivisible and indestructible.

Detailed explanation-3: -In 1808 John Dalton published his first general account of chemical atomic theory, a cornerstone of modern chemistry. The theory originated in his earlier studies of the properties of atmospheric gases.

Detailed explanation-4: -At the beginning of the 19th century, the English scientist John Dalton proposed an atomic theory that became the basis for the study of chemistry. His theory contained five main propositions: 1. All matter is comprised of tiny, definite particles called atoms.

Detailed explanation-5: -The modern atomic theory establishes the concepts of atoms and how they compose matter. Atoms consist of negatively charged electrons around a central nucleus composed of more massive positively charged protons and electrically neutral neutrons.