1. Which type of compound usually has higher melting points, ionic compounds or covalent compounds? What is the reason for this difference in melting points? (3 points)…
(D) Melting point Ionisation energy Valency Atomic radius 11. Which is correct in describing diamond, graphite and fullerenes? (A) (B) (C)…
Covalent Bonds: Where two atoms share an electron to get a total of 8 valence electrons, usually nonmetals…
In this lab, each person in the group will have two pennies. Galvanization of a penny will create a brass penny. Galvanizing the penny in sodium hydroxide with zinc causes the penny to turn from bronze to silver. Once the penny is fully galvanized you will burn the penny and spray it off and then it will turn gold. There will be a weight change also a mass change. Observing the penny to see it turn from bronze to silver to gold.…
Properties: Pearls are good jewelry because they are hard and lustrous. Pearls are hard because of the strong Intermolecular forces created between the Calcium and the Carbonate ions. The pearls luster is dependent on the amount of nacre excreted. The Oyster produces nacre when it is trying to neutralize a foreign particle within it.…
Adamantine: “ resembling the diamond in hardness or luster” (Merriam-Webster.com). Njinga Mbandi was a diamond, she was unyielding, sharp, and she was made into a formidable queen by pressure. Njinga was the queen of Matamba, Africa for 40 years and she went down in African history as one of the most remembered queens in Africa. She was a quick, sly diplomat, able to negotiate the trickiest of situations. Njinga was also a warrior, ever-ready to defend her people. Her queenhood was one of the most successful in Africa’s history.…
The purpose of this lab is to study some of the physical properties of two types of solids – ionic and molecular. The samples used are sodium chloride (ionic) and camphor (molecular). The physical properties studied are odour, hardness, melting point, solubility in water and solubility in 2-propanol. It is observed that some of the physical properties of sodium chloride are no odours, hard, a high melting point, soluble in water and insoluble in 2-propanol; some of the physical properties of camphor are a strong odour, soft, a low melting point, insoluble in water and soluble in 2-propanol. A few conclusions can be drawn from these observations. The particles in ionic solids are held tightly by the force of attraction between ions with opposite charge, because of this strong force of attraction of positive and negative, ionic solids tend to have no odours, a high melting point and they are hard. The particles in molecular solids are held by the van der Waals force of attraction, because of this relatively weak force of attraction, molecular solids have a strong odour, a low melting point and they are soft. Sodium chloride dissolving in only water (not in 2-propanol) and camphor dissolving in only 2-propanol (not in water) have proved that polar solids are soluble in polar liquids only, and non-polar solids are soluble in non-polar liquids only.…
_To tell if it’s real diamond check out it’s density, find it’s mass and volume, see if it’s luster…
When looking at the substitutes, the competitive pressures are weak. When it comes to jewelry, there are not many substitutes besides other stones and fake jewelry. When most people are looking to buy engagement rings, anniversary gifts, or presents, they tend to buy items that contain diamonds.…
Chemical compounds are combinations of atoms held together by chemical bonds. These chemical bonds are of two basic types—ionic and covalent. Ionic bonds result when one or more electrons from one atom or group of atoms is transferred to another atom. Positive and negative ions are created through the transfer. In covalent compounds no electrons are transferred; instead electrons are shared by the bonded atoms.…
Ionic bonds are chemical bonds formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between an metal and a non-metal. The metal loses an electron or electrons form its highest energy level becoming a positively charged Ion and the non-metal gains an electron or electrons in its highest energy level, becoming a negatively charged Ion.…
Elements and compounds are a result of the actions of the valence electrons. There are three types of bonds that I have learned about in the bonding comparison lab. These bonds include ionic, polar covalent, and non-polar covalent. Each of these bonds and the element compounds connected to them has individual solubility, conductivity, melting point, and volatility levels. The three element compounds that will follow are sodium chloride, sucrose, and p-dichlorobenzene.…
* Diamond is the strongest natural mineral known by a man. It is a crystalline form of carbon.…
In nature, the two most common found versions of carbon are graphite and diamonds. Graphite is not only used for pencil lead, but many other industries use graphite in their products. One major use for graphite is in the steel industries. The steel companies mix graphite in with the iron to form a more efficient and stronger metal. Graphite can also be used as a dry lubricant. In places where a wet lubricant like oil cannot be used, finely ground graphite powder works great for these places. Graphite is the only nonmetal that is a conductor of electricity, making it desirable by electrical companies for wire and other electrical devices. The other natural form of carbon is diamonds. Diamonds are the most expensive stones mainly because of their beauty, but diamonds are not only for jewelry, in fact the majority of diamonds are used for industrial uses because of their hardness, they are desired by industrial companies for cutting, grinding, and drilling other hard material such as concrete. Carbon is also in many fuels naturally, including oil and coal, which both contain carbon. Steel companies also use carbon to combine with other metals to make carbides. Carbides are extremely hard and durable, resisting rust. Carbon Black is a finely ground carbon is used to make many different types of ink including printer ink and some ink in pens. Carbon Black is also one of the main ingredients in rubber, a insulator of electricity, meaning…
Chemical bonds are what make up the world. In bonds, elements are held together and form compounds that may have new physical and chemical properties. There are two main kinds of bonds, they ionic and covalent. In bonding the goal of the atoms involved is to reach a level of stability with less energy. In order to reach the epitome of stability, as in the case of noble gases, an atom strives to complete its outer shell. Either losing or gaining electrons may do this, which concludes in an ionic bond or the sharing of electrons with other atoms which makes a covalent bond.…