Why do Elements Have Different Properties?
The reason behind why different elements have different properties can be found on the subatomic level. Interestingly, very few properties come from the nucleus (from the protons and neutrons) and most are linked to the number and especially the configuration of the electrons. One of the few properties which is connected to nucleons is radioactivity, which is caused by an imbalance of protons and neutrons. This means that there is not enough binding energy to hold the nucleus together and it spontaneously looses mass in the form of radiation. Another property related to the nucleus is density, which is almost directly related to the atomic mass.
Reactivity is the property that is perhaps most closely
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When light waves meet electrons, the electrons become polarised and create an opposing wave, stopping the light from penetrating the material and making it seem opaque. However, as the electrons do not follow the waves of light exactly, tending towards a certain frequency. This frequency, and, to a small extent, what frequency the nuclei vibrate at, creates the colour that you see, as well as the luster. If there are less free electrons, either because the material is less dense or because the element simply doesn’t have many free electrons, the material will be more likely to be transparent or translucent. A good example of this is oxygen, which is usually perceived as colourless in its gas form. Hwever, in its (much denser) liquid form, it is clearly light blue.
Free electrons also account for three properties most commonly associated with metals: conductivity, malleability and ductility. The flow of electricity is a flow of electrons passing from atom to atom, so the materials that have the most electrons and want to pass them on will be the best conductors. In malleable or ductile elements, the free electrons act as a sort of lubricant, allowing the atoms to slip out of the lattice structure without cracking, smashing or
Physicists started to realize that stable nuclei can be converted to unstable nuclei. Through such process, they discovered that heavy nuclei can undergo nuclear fission. While testing, they added a neutron to an isotope of Uranium 235. This resulted Uranium 235 to become unstable and break down into Barium and Krypton, releasing two to three more neutrons. The breakdown of Uranium 235 is called “fission”.
Metals contain a sea of electrons (which are negatively charged) and which flow throughout the metal. This is what allows electric current to flow so well in all metals. An electrode is a component of an electric circuit that connects the wiring of the circuit to a gas or electrolyte. A compound that conducts in a solution is called an electrolyte. The electrically positive electrode is called the anode and the negative electrode the cathode.
I am going to discuss about the element known as gold in my assignment. To describe the element gold in simple terms, I can only say that it is an element (chemical element). This element is denoted by the symbol Au. It has an atomic number of seventy nine (79). I will describe quite a number of things concerning gold as an element. To begin with is:
Eventually you notice that when you move from left to right across the periodic table, there is a trend or change in a number of properties. The same thing happens if you go up and down the periodic table and compare the properties of elements. Periodic trends affect how certain elements on the periodic table react to each other. For example, Ionization energy trend: Metals want to give off electrons, nonmetals want to gain electrons. This trend is essentially which elements are likely to react together and how they would react together, which is essentially ion formation of electrons through a reaction.
An atom, by definition, is the smallest part of any substance. The atom has three main components that make it up: protons, neutrons, and electrons. The protons and neutrons are within the nucleus in the center of the atom. The electrons revolve around the nucleus in many orbitals. These orbitals consist of many different shapes, including circular, spiral, and many others. Protons are positively charged and electrons are negatively charged. Protons and electrons both have charge of equal magnitude (i.e. 1.602x10-19 coulombs). Neutrons have a neutral charge, and they, along with protons, are the majority of mass in an atom. Electron mass, though, is negligible. When an atom has a neutral charge, it is stable.
While all atoms of the same element have the same number of protons, it is possible for atoms of one element to have different numbers of neutrons. Atoms of the same element with different numbers of neutrons are called isotopes . For example, all atoms of the element carbon have 6 protons, but while most carbon atoms have 6 neutrons, some have 7 or 8. Isotopes are named by giving the name of the element followed by the sum of the neutrons and protons in the isotope's nucl...
As elements get heavier the ratio of neutrons:protons moves away from being 1:1, Bands of instability surround the band of stability showing where the neutron:proton ratios are either to great or too small,
The Periodic Table is one of the most recognisable and valuable scientific resources. With over 100 elements, each with different physical and chemical properties, the discovery of the periodic system has been one of the most important discoveries in the history of science. The first element, phosphorus, was discovered in the 17th century1. There have been numerous discoveries that have developed the Periodic Table. Humans have been aware of elements for thousands of years; the ancient elements were fire, water, earth and air. Aristotle related these four elements to two of the four sensible qualities or those things perceived by sense, fire is primarily hot and secondarily dry, air is primarily wet and secondarily hot, water is primarily cold and secondarily wet and earth is primarily dry and secondarily cold2.
The Periodic Table is based around the Atomic Theory. Firstly people believed that everything was made up the four elements Earth, Fire, Wind, and Water. This theory evolved into everything being made up of atoms. Breakthroughs throughout history such as the discoveries of the nucleus, protons, neutrons and electrons have pushed this theory forward to where it is today.
It involves collisions between the free electrons, the fixed. particles of the metal, other free electrons and impurities. These collisions convert some of the energy that the free electrons are. carrying heat, which means that electrical energy is lost. Apparatus: I will be using an Ammeter.
Individual atoms can emit and absorb radiation only at particular wavelengths equal to the changes between the energy levels in the atom. The spectrum of a given atom therefore consists of a series of emission or absorption lines. Inner atomic electrons g... ... middle of paper ... ... a sensitive multielement inorganic analyses.
From the unit of chemistry in grade ten science, the students have learned many things from different types of elements in the chart all the way to how each element impacts the daily life each student or even adult lives in. Some of the things I as a student have learned include how to draw the different elements in a bohr rutherford diagram, balancing chemical equations, types of chemical reactions, and even information about the different types of acids and bases. Although there were many other things in the unit, these four definately helped me learn about chemistry in a more in-depth way, as well as teaching me something very new since these were some things a few of the students had never done in the previous years. Learning this in the classroom has really opened my eyes to the world in which we live in today, many times I leave the house on a cold day and as I look upon the cold water becoming ice or even the snow falling down, I know how it is happening, why it is happening, and I can even picture the molecules solidifying as we had seen in class with many different diagrams.
Another force, the weak nuclear force, without it life would be impossible. The weak nuclear force has a large responsibility for the radioactive decay of an atom. Without radioactive decay, radiation would be im...
Radioactivity is a particle that released from nuclei as the result from the unstable nuclear. Because the nucleus it’s a conflict experiences that intense between the two strongest forces in nature so there are many nuclear isotopes that unstable and emit some radiations.
In chemistry, metals compose a great number of the periodic table elements. Each metal has its own characteristic mass,