Atom

Electrons are small negatively charged particles that are found in the electron cloud of an atom. These electrons repel other negatively charged particles and are attracted to positively charged particles. They are important because they play a major role in creating chemical bonds between atoms and contribute to its mass. A scientist by the name of Robert Andrews Millikan won a Nobel Prize for his study and finding of the charge of an electron. His findings greatly helped the scientific…

It was said to believe that the Atom itself was Fundamental and that nothing was smaller. The theory was first proposed by the Greek philosopher Democritus. He named the atom the Atomon, which meant indivisible. His famous quote is “by convention sweet, but in reality atoms and void". He proposed this in the Greek era, specifically around 400 BCE. Later on in 1704, Isaac Newton looked at Democritus 's work. He believed that atoms were indestructible. He also believed that they all…

An atom is a basic unit of an element. For thousands of years, people have been questioning about these tiny particles and have came up with many theories based around it. Though many people believe atomic theories started with John Dalton around the late 1700s or early 1800s. This is not true as the atomic theories started sometime during 300 or 400 B.C. with the philosopher, Democritus, being one of the first to come up with a theory about atoms. Democritus’ theory gave the basics of an atom;…

“Matter, though divisible in an extreme degree, is nevertheless not infinitely divisible. That is, there must be some point beyond which we cannot go in the division of matter… I have chosen the word “atom” to signify these ultimate particles.” – John Dalton. John Dalton is a British chemist who was born in September 6, 1766 in Eaglesfield, England and died on July 26, 1844 in Manchester, England. At the age of 12, he started teaching at a Quaker school in Cumberland. Dalton worked as a farmhand…

will also include very important information that involves 15 scientists and their contributions to the atomic theory. There are many different models that scientists constructed, that they believed atoms looked like. There are only 5 atomic models that have ever been accepted. Our perspective on the atom has changed throughout the years because of new consistent evidence discovered by scientific experiments. This paper will include the all 15 key scientists and experiences that were associated…

and water cycle and constituents. There are multiple theories about the origin of water on Earth, and all the theories suggest that the water come from outer space. The universe with all its extension has some common elements that are found. The atom found most of the universe is hydrogen, and a molecule often found in the universe is water. Water an earth and space is also found in the solid state that is ice.1 The best known theory about the origin of water on Earth suggests that the water…

contain a few atoms that are held by strong covalent bonds for example co2 the molecules contain one atom of carbon that is bonded with 2 oxygen atoms. The intermolecular forces causes the small covalent structures to have a low melting/boiling points, they don’t conduct electricity because they don’t have any free electrons or an electric charge overall. • Macro molecules will have large covalent structure compared to the small covalent substances such as h2, co2 and o2; more atoms are present…

Alkanes form only single bonds, alkenes form double bonds, and in alkynes there is at least one triple bond. Alkanes are hydrocarbons which is only contain single covalent bonds between carbon atoms. Alkenes are known as saturated hydrocarbon. This is because they have the maximum of covalent bonds per carbon atom. They have C-C and…

science that reviews the properties of stereoisomers. It can likewise be characterized as the branch of chemistry concerned about the three-dimensional course of action of particles and atoms and the impact of this on concoction responses. A critical branch of stereochemistry is the investigation of chiral atoms. Stereochemistry is otherwise called 3D science in light of the fact that the prefix "stereo-" signifies "three-dimensionality". The primary investigation of stereochemistry is on…

REACTIONS OF ALDEHYDES AND KETONES ABSTRACT The difference between aldehydes and ketones is by having a hydrogen atom attached to the carbonyl group. This makes the aldehydes very easy to oxidize. Ketones do not have that hydrogen atom and are resistant to oxidation. They are only oxidized by powerful oxidizing agents which have the ability to break the carbon-carbon bonds. This report is about the reactions of aldehydes and ketones. This was done to determine how they react when different…