Atom

Democritus first introduced the idea of an atom. He was the first person to say that everything is made of atoms. He also said that atoms are indestructible and that the changes we see in substances are just the atoms moving. Democritus said that the shape of the atoms give substances different properties. Democritus’ work, however, did not survive through the Middle Ages. Democritus had no real evidence to prove his theory, but he was close to the truth about atoms. In the year 1803, John…

proposed the theory that matter could not be divided into smaller and smaller pieces over and over, he called these tiny pieces atomos. This comes from the meaning “cannot be cut”. He thought that atoms were small, hard and were made up of the same things but came in all different shapes and sizes. Atoms were infinite, always jiggling and joining together. More than two thousand years later, in the early 1800’s the Chemist John Dalton came across a new theory…

Scientists believe that stars are made of mostly gas, and this gas is made up of many atoms. In the star, the atoms in the gas bang into each other and give off different light depending on the type of atoms. This light from stars enables scientists to figure out the type and amount of atoms they are made of. Knowing the composition of the stars, we can guess how they were formed. Therefore we can see that stars are just atoms (hydrogen) hitting each other producing light. Scientists know what…

An atomic model is a proposed idea of what an arrangement of an atom thought to look like. Many physicists such as Dalton Billiard, J.J. Thomson, Ernest Rutherford, and Neil Bohr proposed these ideas and made models based on their own ideas. Out of these physicists, Ernest Rutherford’s planetary model is the most generally accepted atomic model. Ernest Rutherford is a New Zealand born son to a Scottish wheelwright and an English schoolteacher. He did well in school academically as a child and…

machines are large, tube-shaped magnets. An MRI scanner contains two powerful magnets, which represent the most critical part of the equipment. The human body is largely made of water molecules, which are comprised of hydrogen and oxygen atoms. At the center of each atom lies an even smaller particle called a proton,…

the idea of the atom had been in the works for many years. From ideas from Leucippus and Democritus from ancient Greece who first proposed the idea of 'atomos ' meaning “inadvisable”. This idea of the smallest thing went on largely ignored in favour of the ideas of Aristotle, Plato, and Socrates who believed that everything was made up of five different elements; air, water, earth, fire, and ether. In the 1700 's, Sir Isaac Newton brought back the idea of 'atomos ' or, the atom, making up…

times, these fundamental elements were thought of as water, fire, earth, and air. Around 400 BCE, Democritus and Leucippus developed a theory that explained the composition of everything. They said that all matter was composed of, what they called, atoms. It comes from the Greek word “atomos” which means uncuttable or indivisible. They also believed that each item was made up of its…

If you consider quartz, it is quite similar too with the positive charge from Si4+ which is 4+. And thus with 2 Si atoms in it, total positive charges will be 8+. As you have noticed, if we replaced the 2 Si atoms with 1 Fe atom and 1 P atom, they will also be able to create bonds with the O atom without any notable changes in the structure. Furthermore, by heating up SiO2, it would demonstrate the α phase at low temperatures and the β phase at high temperatures…

Diagram 1 ¶: The diagram of the atom Carbon-12 represents an ion and an isotope. Carbon-12 has six protons and six neutrons in its nucleus, as shown on the diagram. Outside of the nucleus, this atom has five electrons. The protons are shown in the color orange, neutrons are in the color blue, and electrons in the color teal. The scientific principle subatomic particles says they are smaller than the atom itself, meaning protons with a positive charge, neutrons with a neutral charge, and…

ISOTOPE EXPERIMENT- BEANIUM Introduction This beanium experiment was performed to display a greater understanding of isotopes of an element. Atoms that belong to the same element with the same number of protons but differ in numbers of neutrons are called isotopes. Since the atomic mass of a element includes the sum of the number of protons and neutrons in the nucleus of the element, It can be said that isotopes would have a different mass. Heavier isotopes tend to react more slowly than…