Neutron activation analysis

Radon is a colorless chemically-unreactive inert gas. You cannot see it, smell it or taste it. The atomic radius is 1.34 angstroms and it is the heaviest known gas. Radon is nine times denser than air. Because it is a single atom gas it easily penetrates many common materials like paper, low density plastic, most paints, and building materials like gypsum board, concrete block, wood paneling, and most insulations. Radon was discovered by Ernest Rutherford and Robert B. Owens in 1899.…

One of the most important scientific discoveries is that of the atom. The Atom is the smallest unit of matter. “Atoms are mostly empty space” (OI/ https://www.thoughtco.com/interesting-facts-about-atoms-603817). It makes up all the four elements. “There are over 100 different kinds of atoms ”(OI/https://www.thoughtco.com/interesting-facts-about-atoms-603817).Over time the theories about the atom have changed a lot, moving from simple to complex. Before 1900, scientists made several…

Contribution to the modern atomic theory the modern atomic theory states that most of an atom is empty space, an atom consists of a small, dense nucleus surrounded by electrons, atoms contain subatomic particles, and the nucleus contains only protons and neutrons. Rutherford's ideas are present all throughout today's atomic model. The scientist that told us “Most of an atom is empty space” was Rutherford. He was also the one who suggested that electrons move in clouds. Though it being somewhat…

evolution of atomic models. In the beginning, Democritus viewed the atom as a tiny, solid, round sphere, that was unable to be cut. He created the first model of an atom, that essentially depicted it as a solid sphere, free of electrons, protons, or neutrons that looks similar to a billiard ball. Next came Dalton, he believed that every element has its own specific atom. He also shared the belief that atoms could not be spilt,…

“Steel plates are commonly attached to each other with rivets, which are slipped into holes in the plates and rounded over with hammers. The hotness of the rivets makes them easier to round over, but their hotness has another important advantage in providing a tight fit. What is it? Explain why.” This relates to one of the characteristics of heat, in that heated objects expand, then contract when the temperature decreases, since the molecules move faster in heat and slow in the cold. The hot…

The element I selected for the Element Research Project is Osmium. Osmium’s chemical symbol is Os. Osmium’s atomic mass is 190 amu. Osmium’s atomic number is 76, it has 76 protons and 76 electrons. Osmium also has 114 neutrons. Osmium belongs to the transition metal group in the middle of the periodic table. Osmium’s Bohr model with electric configuration has two electrons in the first shell, eight in the second shell, eighteen is the third shell, thirty two in the fourth shell, fourteen in the…

This essay going to be about an atom. Atom is always around us all the time and ever object are made out of an atom. We, humans, are also made of the atom. Knowing about the structure and what it really is a very important thing to learn as a student. In order to learn about an atom, we will have to understand about Democritus first. So who is Democritus? Democritus is the first human to ever come up with the first atomic theory. Democritus was born in Greece around 460BC. He has a life spend…

Atoms, ions, and isotopes are everything you eat, breathe and see. They are everywhere and everything is made up of them. The first person that aided in the discovery of the atom was Democritus in 400 BC. He is the one that named the atom. The word atom comes from the Greek word atomos which means indivisible. Aristotle which was another flossier in at that same time disagreed with him. He believed that matter could be divide infinitely without changing its properties. At that time more people…

In this Beanium lab, the objective was to make sense of the numbers used to calculate average atomic mass. By separating, counting, and weighing beans we were able to create the numbers used to calculate the weight of one bean. From there, we could use the total number of beans to produce the percent abundance for each type of bean. These were the numbers that we had to produce in order to understand how and why there are many types of isotopes for each element. In doing this lab, we can think…

Uranium is the element that I chose to write about. Uranium is a element that is a naturally radioactive element that comes in a silverish metal when it’s pure. Uranium quickly oxidizes in air and it can be used to color glass that glows greenish - yellow under a blacklight. Uranium is one of the key ingredients in atomic bombs. Only 1.38% of the uranium in the bomb “Little Boy” detonated over Hiroshima underwent fission and there was 140 pounds of Uranium in total. Uranium is an element that…