WELCOME TEACHERS AND STUDENTSDerector: Chemistry19960964498922CAN THO UNIVERSITYChapter 2: NITROGEN - PHOSTPHORUSDerector: Chemistry19960964498922Derector: Chemistry19960964498922minhtien12a3@gmail.comAverage atomic weightElement nameElectron configurationChemical symbolAtomic numberElectronegativityOxidation number714.0063.041s22s22p3NNitrogen-3, +1, +2, +3, +4, +5Position: Seventh cell, VA group and the second periodDerector: Chemistry19960964498922 O2N2 No support the burning and the respira
WELCOME TEACHERS AND STUDENTS Derector: Chemistry1996 0964498922 CAN THO UNIVERSITY Chapter 2: NITROGEN - PHOSTPHORUS Derector: Chemistry1996 0964498922 Derector: Chemistry1996 0964498922
email@example.com Average atomic weight Element name Electron configuration Chemical symbol Atomic number
Electronegativity Oxidation number 7 14.006 3.04 1s22s22p3 N Nitrogen -3, +1, +2, +3, +4, +5 Position: Seventh cell, VA group and the second period Derector: Chemistry1996 0964498922
No support the burning and the respiration. Derector: Chemistry1996 0964498922 Derector: Chemistry1996 0964498922 firstname.lastname@example.org Think again! In what way is Nitrogen gas collected? Why? N2 N2 H2O Air A B
Congratulations! Derector: Chemistry1996 0964498922 The formation of nitrogen molecule (N2) N N Electron formula N N Structural formula: The triple bond in molecule very stable At ambient temperature, nitrogen is quite chemically inert. At high temperatures and to have catalyst, nitrogen becomes more active. Derector: Chemistry1996 0964498922 * Determine the oxidation number of N in the following compounds:
NH3 N2 N2O NO NO2 HNO3 -3 0 +1 +2 +4 +5 1- Oxidative property 2- Reductive property (is the predominated property) Derector: Dinh Minh Tien 0964498922 1- Oxidative property * Reaction with metals 6Li + N2 → 2Li3N (lithium nitride) 3Mg + N2 → Mg3N2 At high temperature At ambient temperature heat (magnesium nitride) * Reaction with hydrogen 2Al + N2 → AlN heat (aluminium nitride) 3H2 (gas)+ N2(gas) 2NH3(gas) (∆H<0) (to form nitride of metals) ammonia heat, pressure catalyst 0 0 +1 -3 0 0 +2 -3 0 0 -3 +1 0 0 +3 -3 Derector: Chemistry1996 0964498922 2- Reductive property N2(gas) + O2(gas) 2NO(gas)
nitrogen monoxide 2NO (gas) + O2(gas) → 2NO2(gas) nitrogen dioxide (brownish red) 0 0 +2 -2 0 +2 +4 -2 Explain the following proverb: “When the rice is growing, Heard the rain thunder will so happy.” Note: N2 + O2 → N2O; N2O3; N2O5 Derector: Chemistry1996 0964498922 The thunder supplies the energy for the reaction between N2 and O2 to form NO.
Then the chemical processes in the atmospheric nitrate formation to supply protein to the plant.
Derector: Chemistry1996 0964498922 Nitric acid. Fertilizer. Planes tire pump. Foaming beer. Food packaging. Preserve blood Liquid nitrogen Derector: Chemistry1996 0964498922 What the gas is present in the incandescent bulbs? (Long-term use is still not afraid worn hair) Please explain? Thinking question Nitrogen is present in the incandescent bulbs. Because: - Nitrogen is relatively inert → difficult react with metal → increase the lifespan of incandescent bulbs. - Find easily than rare gas. Derector: Chemistry1996 0964498922 1- In the element form Nitrogen is a mixture of two isotopes: 99,63% 0,37% => The average atomic mass of N Weight molecule N2:
Nitrogen is present in sodium saltpeter (NaNO3).
Nitrogen is also a component of animal and plant proteins. 2- In compounds Derector: Chemistry1996 0964498922 Derector: Chemistry1996 0964498922 email@example.com 1 - In industry: Nitrogen is produced by the fractional distillation of liquid air Derector: Chemistry1996 0964498922
O2 N2 gas N2 gas O2 The fractional distillation of liquid air Derector: Chemistry1996 0964498922 2- In the laboratory
Solution NaNO2 Solution NH4Cl H2O N2
Derector: Chemistry1996 0964498922 www.thmemgallery.com Company Logo A. (a) , (b) all correct C. (a) correct and (b) incorrect B. (a), (b) all incorrect D. (a) incorrest and (b) corect
Question 1: Having statement (a) - When reacting with hydrogen, nitrogen exhibit reductive property. (b) - When reacting with oxygen, nitrogen exhibit oxidative property. Derector: Dinh Minh Tien 0964498922 Question 2: What is the condition when nitrogen reacts with oxygen? Choose the correct answer. A. The thunder or electric spark C. 500OC B. Over 3000OC . D. A and B all correct. Derector: Dinh Minh Tien 0964498922 www.thmemgallery.com A. The air C. NH3 and O2 B. NH4NO2 D. All correct Question 3: In the laboratory, what the compound is used to synthesize nitrogen? Derector: Dinh Minh Tien 0964498922 Thanks for your attention See you again! Derector: Chemistry1996 0964498922 Derector: Chemistry1996 0964498922 firstname.lastname@example.org
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