The Elements

because of the many different colors in the element. This element is hard, metallic and shiny. Chromium doesn't tarnish. Chromium is a metal element. Chromium's symbol is "Cr" and has an atomic number of 24. This metal is the first element in group 6. It has an Atomic mass of 52.0. Chromium has 4 known isotopes. Chromium is a "transitional metal." The other family members in period 6 are molybdenum (Mo), tungsten (W), and seaborgium (Sg). All elements in group 6 are transitional metals.…

Chlorine is an element that consists of 17 protons, an average of 18.5 neutrons and 17 electrons. It has an atomic number of 17, and an average nuclear charge of 35.5. There are 2 isotopes of chlorine that are 35Cl and 37Cl. 35Cl has an atomic mass of 35 and a natural abundance of 75%. 37Cl has an atomic mass of 37 and a natural abundance of 25%. The average atomic mass or nuclear charge equates to 35.5. Both of the isotopes have the same atomic number. (BBC Bitesize. Atoms and the periodic…

that it is a final shape of ingot. The composition, physical, mechanical properties of A356.1 Aluminium alloy are shown in table 2.3, 2.4, 2.5 respectively. Table 2.3: A356.1 Aluminium alloy Composition. ELEMENT Weight Percentage Aluminium (Al) 91.73 Silicon (Si) 7.23 Iron (Fe) 0.32 Copper (Cu) 0.18 Magnesium (Mg) …

Chlorine The element chlorine is located in the 7th group in the periodic table it is the symbol for CI. Chlorine is a chemical element it has a atomic mass of 35. Chlorine has 17 protons, 18 neutrons, and 17 electrons. The electron configuration for chlorine is 3s2-3p5. Chlorine has a boiling point of 3.16, and is family with halogen. Chlorine was discovered in 1774 by Carl Wilhelm Scheele. He obtained it through the reaction of the mineral pyrolusite manganese dioxide with hydrochloric acid.…

have an impact on humans’ health and the environment? Chlorine is a chemical element that was discovered by Carl Wilhelm Scheele in 1774. Its symbol is Cl and its atomic number is 17. Chlorine has the physical form of a diatomic greenish-yellow gas at room temperature and atmospheric pressure. 1. 2. Indeed, its name is derived from the Greek word ‘chloros’, meaning ‘yellow-green’. 3. In the Periodic Table of Elements, Chlorine is found in the P-block, in group 17 and period 3. Chlorine is a…

address relation of Iron with other types of elements and what makes it different from the others. The importance of Iron is immense in this world and there are many reasons for that. Iron is a brittle, hard substance found on the list of transitional metals in the periodic table on group 8 and period four. It is classified as a transitional metal. It is one of the most important elements in chemistry and the world. It is the second most common element after hydrogen. It has immense important as…

Dmitri Ivanovich Mendeleyev, born on February 8, 1834, was believed to be the youngest of 14 children. His father, Ivan Pavlovich Mendeleyev was a teacher at a local gymnasium. Around the time Dmitri was born, his father went blind and later died in 1847. Consequently to support the family, his mother Mariya Dmitriyevna Kornileva began working at a small glass factory in a nearby town, and eventually started managing it. On December of 1848, the factory burned down, and the family moved to St.…

drastically changed over time. What we know as an atom today is composed of many subatomic particles. There is a positively charged center in an atom called the nucleus, which contains protons and neutrons (Doc. 3). The number of protons determine what element the atom is, and the number of neutrons influences the atom’s mass. There are also negatively charged particles, called electrons, to counteract the positive charge of the nucleus. These electrons fly around the atom’s empty space, which…

have been incorporating elements from nature as a decorative element since ancient times, but there hasn’t been any scientific data backing up the benefits of integrating nature into a space until recent times. Enabling the human connection to nature within an environment has been found to address the wellbeing of its occupants. Many urban-dwellers today have forgotten about their connection with nature and the natural world, and living in a world…

and water we drink. A substance is a kind of matter that cannot be separated into other kind of matter by any physical process. For example sugar or salt solution, air, water, water in oil. A pure substance consists of a single type of particles (Elements and Compounds).Mixtures are substances formed when different kinds of particles come together. When a substance consists of…