Question
19.Pauli exclusive principle illustrate __ quantum number 20.Which element has a 4s^2' a.Vanadium b. Titanium c. Scandium d.Chromium 21.Element with similar quantum numbers show __ 22.Find the RAM of Cu63 and Cu65 their respective percentages will be given 23.Definition of empirical and molecular formula 24.Identification of halogen and their ion 25.The element with configuration 4s^1 is __ ? 26.Elements are arranged in the periodic table in the order of increasing __ 27.Avogadro's definition 28.Ethanehas a __ shape 29.What is the mass of 2moles of CH4 30.In configuration __ orbital succeeds 3p orbital 31 __ delocalizes electron density by multiple pi bonds 32.Compound with strong covalent bonds are __ a.Highly elasticb.Low melting pointc.Insulatingd.Highly electromagnetic 33.The molecular formular of ethanol is __ 34.The group 2 in periodic table are called __ a. Halogen b. Alkaline metals c. Alkaline earth metal.
Answer
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Ronnie
Veteran · Tutor for 11 years
Answer
19. The Pauli Exclusion Principle illustrates the quantum number s, which is one of the four quantum numbers used to describe the properties of electrons in an atom. The Pauli Exclusion Principle states that no two electrons in an atom can have the same set of quantum numbers.20. The element with a 4s^2 electron configuration is Titanium (Ti). The electron configuration 4s^2 indicates that there are two electrons in the 4s orbital.21. Elements with similar quantum numbers exhibit similar chemical properties because they have the same number of electrons in their outer shells, which determines their reactivity.22. The RAM (Random Access Memory) of Cu63 and Cu65 can be found by looking up the atomic masses of these isotopes in a periodic table. Cu63 has a mass of 62.93 u (unified atomic mass units) and Cu65 has a mass of 64.95 u.23. The empirical formula represents the simplest whole number ratio of atoms in a compound, while the molecular formula represents the actual number of atoms in a molecule of the compound.24. Halogens are a group of elements in the periodic table that include fluorine, chlorine, bromine, iodine, and astatine. They are highly reactive non-metals that readily form negative ions by gaining one electron.25. The element with a 4s^1 electron configuration is Scandium (Sc). The electron configuration 4s^1 indicates that there is one electron in the 4s orbital.26. Elements are arranged in the periodic table in the order of increasing atomic number, which corresponds to the number of protons in an atom's nucleus.27. Avogadro's definition states that equal volumes of all gases, at the same temperature and pressure, contain an equal number of molecules.28. Ethane (C2H6) has a linear shape because it consists of two carbon atoms bonded together by a triple bond, resulting in a straight-line molecular structure.29. The mass of 2 moles of CH4 (methane) can be calculated using the molar mass of methane, which is 16.04 g/mol. Therefore, the mass of 2 moles of CH4 is 32.08 g.30. In the electron configuration, the 3p orbital succeeds the 3s and 3p orbitals.31. Delocalized electron density refers to the distribution of electrons in a molecule or ion that is not confined to a specific atom or bond. This is achieved by multiple pi bonds, which allow electrons to be shared over a larger area of the molecule.32. Compounds with strong covalent bonds are highly elastic because the strong bonding between atoms allows the molecule to deform and return to its original shape without breaking.33. The molecular formula of ethanol is C2H5OH. This represents the actual number of atoms in a molecule of ethanol, which consists of two carbon atoms, six hydrogen atoms, and one oxygen atom.34. The group 2 elements in the periodic table are called Alkaline earth metals. These elements include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They are highly reactive metals that readily form cations by losing two electrons.