Chemical element

4) Elements can be created naturally through processes such as the big bang or other methods conducted by scientists. Scientists are able to create elements by using atomic colliders and quantum calculation. One process that scientists use to create new elements is to add protons one by one into an atom. This would increase the atomic number of the element which would change the identity of the element. The addition of protons causes a repulsion between the atoms because two positive forces…

foods from changing the pH of the digestive system. 4. Define a molecule and a compound. Compare and contrast ionic and covalent bonds. Molecule is the smallest unit of an element or compound, made up of two or more atoms held together by strong chemical bond. Compound is a molecule made up of atoms of two or more elements bonded together. The difference between ionic bonds and covalent bonds are their shape, their state of matter at room temperature, and their melting point. Ionic bonds have…

don’t know about this is that some antiperspirants use aluminum compounds as a way to temporarily plug the sweat ducts in your body, stopping the flow of sweat to the skin’s surface (National Cancer Institute). Though aluminum is a very abundant element, research shows that aluminum has no beneficial role to the body and should be avoided. Some theories state that the aluminum compounds found in antiperspirants can be the cause of breast cancer, Alzheimer’s, kidney disease, and dementia…

A atom is the basic unit of an element .it is a form of matter which cannot be broken down any further .an atom consist of sub atomic particles which are protons, neutrons and electrons .I will be looking at specifically the atom lead. Every element in the Periodic Table has been given a letter symbol , the symbol for lead is Pb.i will now describe the sub atomic particle in lead .protons are in the nucleus of the atom , All atoms of the same element have the same number of protons. This number…

My chemical element is Sulfur. If you were to be looking at a periodic table, its symbol would be S. Sulfur’s atomic number is 16. Sulfur has 16 protons, 16 electrons, and 16 neutrons. Sulfur’s atomic mass is 32.065 and its mass number is 32. Sulfur comes from the Sanskrit word “Sulvere” and also the latin word “Sulphurium”. Sulfur was discovered in Ancient times and has been mentioned in both the Bible and the Torah. Sulfur is commonly found in meteorites, volcanoes, hot springs, and as…

The element copper can be found on the periodic table by looking at its atomic number which is 29. The element copper has a atomic mass of 63.546. Copper was one of the first metals altered by humans. The oldest metal object found in the Middle East consists of copper, it was a tiny awl dating back as far as 5100 B.C. Most copper occurs in ores and must be smelted for purity before it can be used. But natural chemical reactions do sometimes release native copper, according to Chemicool; this…

Radioiodine production Radioiodine is defined as a radioactive isotope of the chemical element Iodine. Although there are at least 37 different Iodine radioisotopes, only four of them are used as tracers or therapeutic agents in medicine; these are 123-I, 124-I, 125-I, and 131-I, with the latter being the most common in clinical practice. Essentially all industrial production of radioiodine isotopes involves four aforementioned radionuclides. History of radioiodine production and usage The…

(2003) Paragraph 1 Crystal chemical relationship between quartz (SiO2) and FePO4 Silicon dioxide is an oxide of silicon with the chemical formula of SiO2. SiO2 is a chemical compound most commonly found in Quartz and it has a space group of P3121. The lattice symmetry of SiO2 is tetrahedron, where there are 4 oxygen atoms covalently bonded to the silicon atom, as shown in Figure 1. Figure 1 - Structure of Silicon dioxide Iron (III) phosphate is a compound with the chemical formula of FePO4.…

Cerium is a rare earth element of the lanthanide series (atomic no. = 57– 71) of the periodic table. Among the various rare earth metals, cerium granted a hugeattention towards scientific community due to its catalytic antioxidant property. Usually, antioxidants protect cells from oxidative damage, mediated by ‘reactive oxygen species’ (ROS), which include free radicals such as superoxide anion (O2•-), hydroxyl radical (•OH), singlet oxygen (1O2) and non-free radical species like hydrogen…

Chemistry Introduction Arsenic is an abundant naturally occurring element with an atomic number of 33 and an atomic weight of 74.92 g. Although strictly a metalloid, arsenic is commonly referred to as a ‘heavy metal’ and can be found within group 4 of the periodic table. It should be noted that most of the other elements within this group have a biological role, but arsenic itself is a toxin (see section 1.x). Some additional chemical properties of elemental arsenic are shown in table_1.…