The firs 20 Periodic table elements description.

Q: Complete the table

A: Electrochemical cells / Galavanic cells / Voltaic cells :  In these cells chemical energy is…

Q: What is protoscience and pseudoscience? What is atomic theory?

A: Science is the study of nature. It describes the fact that how physical world work. Four main…

Q: Which arrangement of elements did Mendeleev find produced a repeating pattern of properties?

A: According to Mendeleev Periodic law, the periodic properties of the elements are repeated after…

Q: How can we explain the distinct lines that appear in an atomicspectrum?

A: Anatomic spectra are also known as line spectra are an emission spectrum obtained by observing the…

Q: complete the table

A: If organic compound contains double bond (or) triple bond (unsaturation) reacts with Br2 , this…

Q: You are an element capable of producing oxygen when fused with you own kind, which element are you

A: Oxygen is a diatomic gas.

Q: 10:51 1 l LTE [cK-12 License 13. The atoms in the air are called. , and they are very a. noble…

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Q: laanpi he cheinl centrn u RoS %23 H.

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Q: Can neutrons in the nucleus of a particular element do vary ?

A: Atom consist an nucleus having positive charge. Nucleus consist proton and neutron.

Q: Solve the attached Problem.

A: The given reaction is the reduction of alkynes to trans alkenes in the presence of liq. NH3. The…

Q: 1s22s22p63s23p4 is what element?

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Q: neutrons/cm2.s), calculate the number of neutrons captured per second by 1.0 cm-2 of the

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Q: Describe why "new" elements (man-made elements) are created, or why do we benefit in creating them?…

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Q: how is mass spectrometry important in biology?

A: In this question we will answer how mass spectrometry is important in biology. How it is useful, its…

Q: NABHz CN NH3, Hg ot H3 Ot Por3, KoC (cH3h. 0s \. BH3 2. +202, O4- crqele DCC

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Q: 'wrले लबकेबै (लि मुरकतकी कल् उ.।13 तकe्य ्भी काटोरे निवाण्र (ए Wान्न कन कर लाck्ये इर--8 s8. 698ाm

A: Answer: Given data: Moles of Nickel n=3.13mol Molar mass of Nickel M=58.69g/mol

Q: बालांग केट बेजडं छु नव बुब्छ Cataulate (moজ গ৭ss = 15০৪ ৭mo.J) वन SS.० c१md 980.0mm Hg R=0.0821 L·…

A: Given Data :

Q: What percentage of 145X (t1/2 = 768.7 h) would remain after 505.4 hours. Use the formula with 0.693…

A: Use first order kinetics formula to get the answer  Remaining percent=64.93%

Q: Who designed the periodic table?

A: Periodic table is invented to arrange various elements so that one can get a clear and easy idea of…

Q: Mass of the crucible and cover Mass 34.7816 134.76516 34.7658. After 1ª heating After 2nd heating…

A: A numerical problem based on heating experiment, which is to be accomplished.

Q: 18 ic weights are based on the Atomic Elements 1995 publishedby IUPAC Не 13 14 15 16 17 4.003 6. 10…

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Q: Complete the table.

A: Given equation is : Also, Rate of reaction = 0.010 M/s

Q: The number of neutrons in the nucleus of the isotope 22Na is

A: The number of neutrons

Q: Name the scientist who receives the major credit for the development of the periodic table. In what…

A: The long form of periodic table is the arrangement of all elements in the increasing order of their…

Q: examples of Ssily the definitions in the introduction. Cr2 O3 + 2Al- 2Cr + Al½O3 CH4 + 202+ CO2 +…

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Q: a)ster 2 02022 J Kote an CHEM40B W22 Klosterman CHEM40B VW2 N22 ©2022 Klosterman CHEM40B WN22 /man…

A: Both these given reactions are example of the addition reaction to the unsaturation. In the first…

Q: Electron- Proton- Atomic number- Atomic mass- Neutron- Nucleus- C. Isotopes or Different Elements?

A: A typical atom is made up of subatomic particles that include electrons, protons, and neutrons.…

Q: What is relative abundance

A: Given question is :  What is relative abundance = ?

Q: Determine the missing element -3516S----à -10e + ?

A: Balanced nuclear equation is the equation in which the sum of subscripts as well as sum of…

Q: CPM eBooks - CCA. Use the periodic table from an alternative universe below to answer the questions…

A: Mass of M=60 grams Mass of MAx3=?

Q: The natural isotopes of sulfur and their molar masses and mass fractions are respectively 2210S:…

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Q: Describe the experiment that provided the basis for ourunderstanding of the nucleus.

A: Describe the experiment that provided the basis for our understanding of the nucleus.

Q: Skeich. diprem in diatm S-Poocess barth faom 14° Ce Specfy tbe of earch bebacesys (lies neutron > Eo…

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Q: yiolsotopes and Average Atomic Mass

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Q: Find thi onidotion numbun ok the undenlinıd atomi +3

A: When a hydrocarbon reacts with oxygen then, it will form carbon dioxide and water and liberate huge…

Q: It ask that I use a rulet to determine the Rf values for each dye in the mixture. Is this correct?…

A: Rf is stand for retardation factor. It is the ratio of distance covered by solute to the distance…

Q: SiMe3 KH →? Bu. (üi) HeX BF3 OE12 →? OH

A: This question is besically from elimination reaction named as Peterson Olefenation reaction . In…

Q: 27 Te value of Ag 9ts ecnstituent element Pzcg) +3C/2cg)→2Pcl3(9) is A)-SB9.2 B) t539.2 C)-373.3…

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Q: 43 100 80 60 27 29 40 28 41 42 39 20 58 15 10 20 30 40 50 60 Mass/charge (mle) Relative abundance…

A: Mass spectrometry is the most accurate method for determining the molecular mass of the compound and…

Q: 2:58 PM, Apr 22 H3C H30+ ? Brz SCH3

A: In this question, we will Identify all the Reagent and one middle starting material which give…

Q: How are the atomic masses of the natural isotopic mixtures calculated?

A: Given information,  The atomic masses of the natural isotopic mixtures calculation

Q: What is Leucippus contribution atomic theory?

A: Matter can be defined as any substance that has some mass and occupy space. Matter can be solid,…

Q: Mickel (T)Sahe+ Ptassium Hidenide ?

A: Complete the following reaction

Q: An element has a mass of 207 and has 125 neutrons in its nucleus. How many protons and electrons…

A: The smallest unit that retains an element's attributes is defined as an atom. Atoms can't be created…

Q: Defend or refute the statement • The separation of a mixture may result in the production of an…

A: Mixture is a composition where two or more different components are mixed . The process of parting…

Q: o 2}H + 2 }n → He o ŞLi + n+He + {T 41 p + 3D +He 1, 4. 1, o D + {T → He + o 37 1, He + T → He + 20…

A: Since in any reaction, 1) total mass number of the reactants = total mass number of the products  2)…

Q: 65 30Zn 32 16S2 137 Isotopic Symbol Atomic No. 30 (4) (8) Nuclear (1) (5) +56 Charge Mass No. 65 (6)…

A: For an element AzX, where z= the atomic number of element "X" and A= the atomic mass of element "X".

Q: Part A What is the mass of 5.08x1021 platinum atoms? • View Available Hint(s) V ΑΣφ m = Submit

A: 1- First calculate the moles of Pt atom :   We know that,  Moles = [ number of atoms / Avogadro…

Q: Use the mass spectrum 100% of mercury shown here to estimate the atomic mass of mercury. Esti- mate…

A: Mass spectroscopy is used for determining the atomic mass of an element. The position of each peak…

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.