By Sooji and Claire
Facts about the periodic table:
- Elements are arranged in horizontal rows called periods in order of increasing (proton) number - The number of electron shells is the same as the period number - Elements with the same number of outermost electrons are arranged in vertical columns called groups - The number of outermost electrons is the same as the group number
- Properties within each individual group are similar, but vary slightly
- Generally, chemical activity decreases as the period increases a non-metal group and increases as the period increases within a metal group
The history:
Dimitri Mendeleev, the inventor and father of the periodic table, percieved the correct classification method "the periodic table" for the 65 elements known in his time by their atomic weights and chemical valency. Mendeleev then went further, using the remaining gaps and spaces in his periodic table, and concluded that a group of yet unknown elements must exist to fill up the gaps in the periodic table.
Fifty years after Dimitri Mendeleev created the periodic table, british scientist Henry Moseley discovered that the number of protons in the nucleus of a particular type of atom was always the same. When the atoms are arranged via their atomic number, the few remaining problems with Mendeleev's original periodic table disappeared. Due to Moseleys's work, the modern periodic table is based on the atomic numbers of the elements rather than the mass. Henry Moseley:
Fun Facts Did you know that the only letter not appearing in the periodic table is "j"?
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By: Jeremy and Lionel According to the Particulate theory of matter, everything is made up of atoms which are made up of protons, neutrons and electrons. Depending on what state the object is in, the space in between the atoms would be different. For example, in solids, they have the least space in between them as the atoms are packed very close to one another which only allows them to vibrate on the spot. In liquids, they are close to each other but still have more space to move around than in solids. In gas, the atoms have the most space to move around and are able to move about freely because of the gap between each atom. Diffusion would occur in liquids and gases but not solids due to the space between atoms. This movement causes the smell or color in them to spread about in a random manner. Absolute Zero occurs at –273 Degrees Celsius, which there is absolutely no heat and nothing can move as all particles come to a stop.
 
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By: Kevin and Htet
Hydrolysis is classified as a chemical reaction which occurs between hydrogen (H+) and hydroxide (OH−) ions with water molecules. This happens when the molecule is “cleaved” into two parts, with one particle gaining a hydrogen ion from the water molecule whilst the other collects the remaining hydroxyl group (connected by a covalent/single bond). In other words, it can be described as the process of a large molecule or compound being split with the addition of water.
Generally, the most common form of Hydrolysis occurs when salt is dissolved into water, causing their ions to form an acid and a base (one of which has slight dissociation). Different results of Hydrolysis can be achieved under different conditions, i.e. under normal conditions, hydrolysis is considered less effective as fewer reactions occur. In today’s world, there are several uses of Hydrolysis, including utilization in natural energy resources, meat processing, and as a reaction in the breaking down energy sources.
Hydrolysis Uses:
Natural energy:
Hydrolysis cell can be used in the generation of wind power through a process of converting kinetic energy into chemical energy (provided an electrical current and magnetic field environment. This conversion of energy can level the fluctuations in kinetic energy within windmill power systems, thus rendering the mills to act more efficiently. Meat Processing:
Thermal Hydrolysis can be used during the process of certain organic animal by-products. When the temperature is set at 180 degrees C and excessive pressure is added, complex proteins can be broken down into simple amino acids and peptides. These products can destroy all pathogens (germs) present in meat resources such as cattle, sheep, elk, and deer.
Breaking Down Starch:
A common use of Hydrolysis is during the process of the breaking down of starch, where it is considered the key reaction. Starch can be broken down two ways, both including hydrolysis reactions:1. Starch is boiled with diluted hydrochloric acid and broken down into glucose molecules. 2. Starch is mixed with saliva for a few minutes and is broken down into maltose. The first reaction utilizes acid hydrolysis whilst the second uses enzyme hydrolysis. Thus, the result depends on which type of hydrolysis is used.
In conclusion, it could be said that Hydrolysis is a very useful chemical reaction in the modern world. With the innovative use of Hydrolysis to sterilize food, aid in wind power generation, and breaking down of food sources, Hydrolysis has helped us in more ways than we could imagine. Who knew that by just dissolving salt into water, scientists could achieve such results!
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hello people. thank us for this. and we get merits :D Jingxi and tasha.
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By Sooji and Claire
Facts about the periodic table:
- Elements are arranged in horizontal rows called periods in order of increasing (proton) number - The number of electron shells is the same as the period number - Elements with the same number of outermost electrons are arranged in vertical columns called groups - The number of outermost electrons is the same as the group number
- Properties within each individual group are similar, but vary slightly
- Generally, chemical activity decreases as the period increases a non-metal group and increases as the period increases within a metal group
The history:
Dimitri Mendeleev, the inventor and father of the periodic table, percieved the correct classification method "the periodic table" for the 65 elements known in his time by their atomic weights and chemical valency. Mendeleev then went further, using the remaining gaps and spaces in his periodic table, and concluded that a group of yet unknown elements must exist to fill up the gaps in the periodic table.
Fifty years after Dimitri Mendeleev created the periodic table, british scientist Henry Moseley discovered that the number of protons in the nucleus of a particular type of atom was always the same. When the atoms are arranged via their atomic number, the few remaining problems with Mendeleev's original periodic table disappeared. Due to Moseleys's work, the modern periodic table is based on the atomic numbers of the elements rather than the mass. Henry Moseley:
Fun Facts Did you know that the only letter not appearing in the periodic table is "j"?
|
|
By: Jeremy and Lionel According to the Particulate theory of matter, everything is made up of atoms which are made up of protons, neutrons and electrons. Depending on what state the object is in, the space in between the atoms would be different. For example, in solids, they have the least space in between them as the atoms are packed very close to one another which only allows them to vibrate on the spot. In liquids, they are close to each other but still have more space to move around than in solids. In gas, the atoms have the most space to move around and are able to move about freely because of the gap between each atom. Diffusion would occur in liquids and gases but not solids due to the space between atoms. This movement causes the smell or color in them to spread about in a random manner. Absolute Zero occurs at –273 Degrees Celsius, which there is absolutely no heat and nothing can move as all particles come to a stop.
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|
By: Kevin and Htet
Hydrolysis is classified as a chemical reaction which occurs between hydrogen (H+) and hydroxide (OH−) ions with water molecules. This happens when the molecule is “cleaved” into two parts, with one particle gaining a hydrogen ion from the water molecule whilst the other collects the remaining hydroxyl group (connected by a covalent/single bond). In other words, it can be described as the process of a large molecule or compound being split with the addition of water.
Generally, the most common form of Hydrolysis occurs when salt is dissolved into water, causing their ions to form an acid and a base (one of which has slight dissociation). Different results of Hydrolysis can be achieved under different conditions, i.e. under normal conditions, hydrolysis is considered less effective as fewer reactions occur. In today’s world, there are several uses of Hydrolysis, including utilization in natural energy resources, meat processing, and as a reaction in the breaking down energy sources.
Hydrolysis Uses:
Natural energy:
Hydrolysis cell can be used in the generation of wind power through a process of converting kinetic energy into chemical energy (provided an electrical current and magnetic field environment. This conversion of energy can level the fluctuations in kinetic energy within windmill power systems, thus rendering the mills to act more efficiently. Meat Processing:
Thermal Hydrolysis can be used during the process of certain organic animal by-products. When the temperature is set at 180 degrees C and excessive pressure is added, complex proteins can be broken down into simple amino acids and peptides. These products can destroy all pathogens (germs) present in meat resources such as cattle, sheep, elk, and deer.
Breaking Down Starch:
A common use of Hydrolysis is during the process of the breaking down of starch, where it is considered the key reaction. Starch can be broken down two ways, both including hydrolysis reactions:1. Starch is boiled with diluted hydrochloric acid and broken down into glucose molecules. 2. Starch is mixed with saliva for a few minutes and is broken down into maltose. The first reaction utilizes acid hydrolysis whilst the second uses enzyme hydrolysis. Thus, the result depends on which type of hydrolysis is used.
In conclusion, it could be said that Hydrolysis is a very useful chemical reaction in the modern world. With the innovative use of Hydrolysis to sterilize food, aid in wind power generation, and breaking down of food sources, Hydrolysis has helped us in more ways than we could imagine. Who knew that by just dissolving salt into water, scientists could achieve such results!
|
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hello people. thank us for this. and we get merits :D Jingxi and tasha.
|
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Haber process Contact process and Reversible reaction
BY JOY AND NATASHA
<!--[if !mso]> v\:* {behavior:...
chemical structures by alex and clarisse
CHEMICAL BONDING by: Jingxi and SlinHistory of Van...
metals. like super duper wtf ftw late.
Acid
Why does salt melt ice?
Chemical Caculation
Periodic Table
Particle Theory of Matter
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