TEACHER DIALOGUE AND STUDENT ABOUT NOBLE GASS
In class during chemistry lesson.
Teacher: Assalammualaikum Childs, morning.
Student: Waalaikumsalam,morning miss.
Teacher: Okay we start today's lesson. Today we will discuss about noble gas.
Does anyone know what is noble gas?
Shindy: Noble gas is in group VIII A.
Teacher: That’s right, other opinions?
Waye: The most popular gass miss.
Teacher: Do you know why named the
noble gas?
Waye: The most glorious gas of all gass miss.
Teacher: Almost right, It is noble because these elements are very stable or
very difficult to react.
Akbar: So is she noble because it is lazy? Does it so pathetic!
Teacher: Hahah right, Even the first noble gas found to be named argon which means lazy.
Meme: First? Indeed how many noble gases? Whether there is a second, third, and so on?
Teacher: Off course, there is 6 noble gass
Akbar: Wow, are they siblings to each other?
Teacher: Off course. Therefore they are put into a group, the VIII A group, also called noble gas. There is Helium, Neon, Argon, Krypton, Xenon, and Radon.
Iman: Are all the gases present in our air miss?
Teacher: Yup, but not as much oxygen, among them the most Helium content among other noble gases because Helium is the fuel of the sun. Noble Gas Elements, except Radon, are abundant in number because they are in free air. Radon is the most reactive and dangerous gas for all of us.
Dennis: Why radon is so dangerous miss?
Teacher: Because the most severe gas radon 7.5 times the weight of air, odorless and harmful to health. Radon has a half-life of 3.8 days and is used in radiotherapy. Radon can cause lung cancer, and is responsible for 20,000 deaths in the EU each year.
Dennis: Wow it can kill ourselves!
Shindy: What about the other miss?
Teacher: Helium means sun, Has the symbol He and the atomic number 2. Colorless and lighter than air. After Hydrogen, Helium is the second most abundant element in the universe. Helium is a substance that is light and does not muadah burning, Helium is used to fill the air balloon, and helium is not reactive used to replace nitrogen to create artificial air used in sea floor dives. Helium in the form of liquid can also be used as a coolant because it has a very low vapor point and not dangerous. Next Neon means new, Neon has Ne symbol and atomic number 10. Neon including element of Gas Mulia which is colorless and inert. Neon is usually used to fill fluorescent lamps. It can also be used to share things like high-voltage indicators, refrigerants, lightning rods, and television tubes. Next Krypton means hidden, krypton has Kr symbol and atomic number 36. Colorless gas, odorless, and tasteless, Krypton with argon is used as a low-pressure fluorescent lamp filler. Krypton is also used in flash for high speed photography. Next Xenon means foreign, has Xe and atomic number 54. Odorless, colorless, and non-toxic. Xenon can be used in the manufacture of lamps for bactericide (bacteria killer) and the manufacture of electron tubes.And the last Argon, Argon means lazy, has the symbol of Ar and the atomic number 18. Argon is the first largest element in free air (dry air) and the third most abundant in the universe. About 1% of Earth's atmosphere is Argon. Argon is a colorless and odorless element. The amount of this element continues to increase since the earth is formed because of the radioactive Potassium transformed into Argon, Argon can be used in titanium welding and stainless steel. Argon is also used in welding and as an incandescent light bulb. Any question or response guys?
Meme: So they are dangerous still be useful miss.
Teacher: Off Course, because God is fair. Ok Guys, any question or response?
Student: No miss.
Teacher: Ok, i think enough for today, we will meet again next week. See you class. Assalammualaikum
Student: See you miss. Waalaikumsalam
How are the elements of noble gases in nature?
BalasHapusThe noble gases are the elements that exist in Group VIIIA which have very high stability and some are found in nature in monoatomic form. The elements present in the noble gases are Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn). This gas gas is very little content on earth. In the dry air it will be found the noble gas content as follows:
HapusHelium = 0.00052%
Neon = 0,00182%
Argon = 0.934%
Kripton = 0.00011%
Xenon = 0,000008
Radon = Radioactive *
But in the universe the content of Helium is at most among other noble gases because Helium is the fuel of the sun. Radon is very little in the atmosphere or air. And even if found it will quickly turn into another element, because radon is radioactive. And because of the very small amount of radon is also called a sparse gas.
Is there any noble gas that can react with other elements?
BalasHapusNoble gases can react, but it is very difficult, to react requires certain conditions. The ability of noble gases to react very less. This is because the electron configuration is a stable electron configuration.
HapusWhy the most reactive radon among other noble gases?
BalasHapusThe noble gas reactivity will be directly proportional to the radius of the atom. Thus, the reactivity of the noble gases will increase from He to Rn. This is because the increase of atomic radius causes the core attraction to the outer electron of the outer shell is reduced, making it more easily withdrawn by other atoms. However, such noble gas elements can only bind to highly electronegative elements such as fluorine and oxygen.
HapusArgon is a colorless and odorless element. How can a scientist find the argon element while we know that argon is colorless and smelly?
BalasHapusDiscovery of argon is not as easy as capturing animals as we imagine. Argon ('αργόν, singular ari' αργός, Greek meaning "inactive", referring to chemical inactivity) was suspected of being airborne by Henry Cavendish in 1785 but not isolated until 1894 by Lord Rayleigh and Sir William Ramsay at University College London in an experiment eliminates all oxygen, carbon dioxide, water, and nitrogen from clean air samples. They have measured that the nitrogen produced from a chemical compound is one and a half percent lighter than nitrogen from the atmosphere. The difference is glanceously insignificant, but it is important enough to draw their attention for several months. They concluded that there is another gas in the air mixed with nitrogen. Argon was also found in 1882 through independent H.F research. Newall and W.N Hartley. Each observes a new line in the air color spectrum but is unable to identify the cause element of that line. Argon is the first member of the noble gas found. The current argon symbol is "Ar", but until 1957 the symbol is "A". The earth's atmosphere contains argon of 0.934% of its volume and 1.288% of its mass, and air is the main raw material used by industry to produce pure argon products. Argon is isolated from the air by fractionation, most commonly by distillation of the crystalline fraction, a process which also produces nitrogen, oxygen, neon, krypton and pure xenon. The Earth's crust and seawater contain 1.2 ppm and 0.45 ppm of argon, respectively.
HapusExplain the usefulness of noble gas compounds?
BalasHapusUsefulness of Helium (He)
Hapus1. As a gas filling air vessels and hot air balloons for studying the weather, because of its hard-to-react, non-combustible and lightweight.
2. The air used by divers is a mixture of 80% He and 20% oxygen. Helium is used to replace nitrogen because if the diver is at high pressure (under the sea) then most likely nitrogen dissolves in the blood. In just a small amount of nitrogen soluble in the blood, there will be a hallucination called nitrogen nitrogen. Due to these hallucinations the divers experienced such a drug exposure that endangered the divers. In addition, when nitrogen dissolves much in the blood and the diver returns to its normal state, a nitrogen gas bubble bursts in the blood causing intense pain as nitrogen passes through the blood vessels and can even lead to death. This is called benos.
3. Helium and Oxygen mixtures are also used by workers in underground tunnels and high pressure mines.
Use of Neon (Ne)
1. Neon is usually used to fill the fluorescent lamp
2. Neon is also used as a refrigerant, high voltage indicator, lightning rod and for television tube fillers.
3. Liquid fluid is used as a coolant in nuclear reactors.
Use of Argon (Ar)
1. As an incandescent lamp filler because it does not react with hot tungsten wire
2. For billboard light with pink light
3. As atmosphere of welding objects made of stainless steel, titanium, magnesium and aluminum. Suppose titanium welding on the manufacture of aircraft or rockets
Krypton Utility (Cr)
1. The krypton gas together with argon is used to fill the low pressure tioresensi lamp (fluorescent lamp). Krypton is what makes the light turns white.
2. For high-speed photography flash
3. Krypton is also used in lighthouse lights, lasers for retinal treatment.
Xenon Usability (Xe)
1. For anesthesia of patients at the time of surgery because xenon is anesthetics (flavoring)
2. Making lamps for bactericide (bacteria killer)
3. To eject the light on the camera during shooting (flash)
Radon Usability (Rn)
1. Radon gas is radioactive so it is widely used in radiation therapy for cancer patients by utilizing the light dihsilkan. However, if radon sucked in sufficient quantities will cause lung cancer
2. Due to rapid decay, radon is used in hydrological investigations that examine the interactions between underground water, creeks and rivers
3. Radon can also act as an earthquake warning because when the earth plate moves radon levels will change so that bias is known if there is an earthquake of radon levels changes.
Whether this stable and difficult reacting element is his trademark?
BalasHapusThe noble gases are elements of class VIIIA (18) in the periodic table. It is called noble because these elements are very stable (very difficult to react). There is no natural compound of noble gases. According to Lewis, the stability of this noble gas is due to its fully charged electron configuration, the octet configuration (duplet for Helium). The stability of noble gases is reflected by its enormous ionisation energy, and its very low electron affinity (marked positive). Ancient scholars believe that the noble gas elements are completely inert.
HapusPrecious gases are gases that are inert, nonreactive, and hard to react with other chemicals. Noble gas is widely used in the industrial sector.