Calculate the density in m-3 of mobile electrons in a metal with the following properties Electron configuration: 1s2 2s2 2p6 3s2 3p1 Atomic weight (A): 26.98 Mass density: 2.7 x 106 g m-3

Q: Nombre de protons Nombre de neutrons Carbon: C 6 6 Hydrogen: H 1 Oxygen: O 8 1- Distinguish between…

A: Anything which occupies space & have mass is matter. Example: Elements, compound.

Q: magnesium aluminum sulfur silicon

A: To solve this question,  it is very important to write electronic configuration of all the species…

Q: Which atom and/or ion is (are) isoelectronic with Br+: Se2+, Se, As–, Kr, Ga3+, Cl–? What Do you…

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Q: Explain the trend in effective nuclear charge (Z*) going from left to right across periods in the…

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Q: Place the following isoelectronic ions in order of increasing ionic radius (i.e., from smallest to…

A: The electron configurations of the given isoelectronic ions are, Y3+ = 1s2 2s2 2p6 3s2 3p6 3d10 4s2…

Q: Provide the electronic configuration and electron orbital diagram for nickel (Z = 28).

A: The arrangement of electrons of an atom or molecule in atomic or molecular orbitals are called…

Q: Dipole Moment (µ) Molecule C:H6 C:H4 C:H2 BF3

A: The covalent bond formed by the atoms of different electronegative atoms will be polar. The atom of…

Q: 4.32 (a) Calculate the enthalpy of formation of the hypothetical compound KF, assuming a CaF,…

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Q: Bromine is used in the manufacture of disinfectant products, it has a very strong oxidizing…

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Q: What element forms an ion with an electronic configuration of [Xe] and a −2 charge?

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Q: full electron configuration of the ion oxide, O2-

A: Atomic number of Oxygen (O) is 8 which means that O has total 8 protons and 8 electrons.

Q: (Express your answer as a series of orbitals. For example, the electron configuration of Li would be…

A: All the electrons are arranged on orbital according to Hund's rule and aufbau principle.

Q: Which element has the electron configuration [Ar]4s23d104p O phosphorus O calcium chlorine bromine

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Q: Based on the properties from this chapter and their positions in the periodic tables, provide one…

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Q: Name one metalloid in period 4 and one non-metal in period 5:

A: The metalloid in period 4 is ,        Germanium  (Ge)       Arsenic (As)

Q: Which of the following atoms are paramagnetic?  a Zn  b O  c P  d Mg

A: It is explained as given below :

Q: Which of the following elements would you expect to have the smallest atomic radius? Ga K Se Kr

A:

Q: What is the first ionization energy of your element? What are the most prevalent isotopes of your…

A: Part: (i) Ionization Energy: The energy which is required to remove one electron from its outermost…

Q: What charge would Ti have to be isoelectronic with Ca2+?

A: Isoelectronic species are those species which have same number of electrons present in them.

Q: beryllium hypochlorite scandium(I) chromate hydrogen telluride

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Q: The elements of the actinide series are shown in the diagram. Some of the actinides ions are not…

A: Given : We have to tell why actinides are colorless.

Q: GIVEN: (Probable atomic weights: N=14; O=16) Nitrogen dioxide 2.05 21 - 11.2 32 33.18 Nitrous oxide…

A: Two questions based on states of matter, which is to be accomplished.

Q: In the Periodic Table below, shade all the elements for which the neutral atom has an outer electron…

A: Given: The outer electron configuration of the element is ms2nd10  Where m and n are integers. And m…

Q: I don't understand. It must be in a +3 state? Why? F has a -1 charge, that means it would have: 9p…

A: Answer: Metal M should be chosen from the ones given in option.

Q: Which atom and/or ion is (are) isoelectronic with Br+: Se2+, Se, As–, Kr, Ga3+, Cl–?

A: The atoms or ions containing equal number of electrons are known as isoelectronic species.The number…

Q: Q.Arrange the following in their increasing size with the help of slater’s rule and also give…

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Q: Consider the isoelectronic ions F− and Na+. Using the equation Zeff=Z−S and assuming that core…

A: According to question, Given the equation Zeff=Z−S  Where,  Zeff= Effective nuclear charge Z =…

Q: Which one of the following has the smallest atomic radius? Cl Li Na F Cs

A: Atomic radii: Atomic radii can be defined as by saying that the distance of the nucleus from the…

Q: Choose one group of representative elements (main group elements) and discuss its chemistry by…

A: The chemically active elements whose outer orbitals are not completely fulfilled is known as…

Q: 22. The graph on the left below shows the trend in atomic radius moving left to right across period…

A: We can see that graph is different for atomic radius and ionic radius for period 3.The atomic radius…

Q: B Na,S O,

A: 6) To write net ionic equation, follow the below mentioned steps: 1)Write balanced chemical…

Q: Despite the expected decrease in atomic size, there is an unexpected drop in IE1 values between…

A: Ionization enthalpy, IE, is also called ionization potential is the ability to remove the electron…

Q: Are the d-orbitals in Zn higher- or lower-E than those in Ni? Will this strengthen or weaken the…

A: Pi back bonding A bonding interaction between the filled d -orbital on the metal and vacant ligand…

Q: Which element from row 2 will have the following ionization energies? IE1 = 1086 kJ, IE2 = 2353 kJ,…

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Q: Is strontium a type1 or type2 metal?

A: Firstly understand what is TYPE-1 and TYPE-2 metals:- •TYPE-1 METALS:-Metals whose ions(cations) can…

Q: Select all of the atoms which bear lone electron pairs. • Gray = C: white = H; red = 0; blue = N;…

A: White = Hydrogen, HBlue = Nitrogen, NRed = Oxygen, OGrey = Carbon, C

Q: Which element would be expected to have chemical and physical properties closets to those nitrogen(N…

A: sulfur, because it's in the same groupGroups are columns of a periodic table. Both oxygen and sulfur…

Q: why doea a transition series contain 10 elements?

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Q: Arrange the following elements in order of increasing ionization energy (lowest first). = Mg = Al =…

A: Ionisation energy is defined as the energy needed to remove the outermost electron from any isolated…

Q: This elements produced bright yellow flame when used in fireworks. * Ве Ca O Sr Mg Group 2 elements…

A: Answer Q=1 which element produce bright yellow flame when used in…

Q: Arrange the following elements according to the increase in their atomic sizes; (0, S, Se) S> Se >0…

A: Atomic radius: The atomic radius of an element decreases as we move from left to right in a period…

Q: Place the following in order of increasing atomic radius. As Br As < Br < O O < As < Br Br < As < O…

A: The order of increasing atomic radius of As, O , Br = ?

Q: Does the reaction of a main-group metal oxide in water pro-duce an acidic solution or a basic…

A: Main group elements are the elements of s and p block. The element which belongs to second period…

Q: Write the net ionic equation for the following (including the corresponding charges): Ti(NO3)4 +…

A: Chemical reactions are of many types. One of them is the precipitation reaction. In these reactions,…

Q: Activity 2.2. Using noble gas cores, write the shorthand electron configuration of the following: a.…

A: Using noble gas cores, write the shorthand electron configuration of the following: a. Zn b. Ba c.…

Q: 3. Does the reaction of a main-group metal oxide in water produce an acidic or a basic solution?…

A: Metal oxides are crystalline solids that contain a metal cation and an oxide anion. Main group metal…