Predict the chemical formulas of the compounds formed by the following pairs of ions: (a) Fe3+ and O2- , (b) NH4+ and PO43- (c) Ag and N , (d) Ca and Br, (e) Sr and Cl

Q: Explain the horizontal irregularity in size of the most com-mon ions of Period 3 elements.

A: Period 3 elements are given below,        Sodium (Na), Magnesium (Mg), Aluminium (Al), Silicon (Si),…

Q: To which group of the periodic table does the general valence electron configuration ns2np4…

A: ns2np4 means 2 electrons in outer s orbital and 4 in outer p orbital

Q: In complete sentences, explain: (a) why Se2 - and Br - are about the same size; (b) why Br - is…

A: (a)

Q: How many electrons can the third shell (i.e., n=3) hold for an atom?

A: Number of electron that a shell can accommodate = 2n2, where, n = number of the shell.

Q: Which of these species make an isoelectronic pair: CI, O²-, F, Ca²+, Fe³+? Ca²+ and Fe³+ Cl and Ca²+…

A:

Q: What ions are possible for the two largest stable elements in Group 4A(14)? How does each arise?

A: The atomic number of Sn is 50 so its electronic configuration is [Kr] 5s24d105p2. It can lose 2…

Q: Which element forms a 3+ ion that has the electron configuration 3Kr44d 6?

A: The given electronic configuration of the 3+ ion is:  [Kr] 4d6 ⇒ The electronic configuration of the…

Q: Determine the electron configuration of tungsten (W) in WO3.

A: Electronic configuration of tungsten (W):

Q: Among the oxides of Na2O, MgO, Al2O3 the least basic oxide is Al2O3 True or false

A: The oxides of the metals are basic in nature. These oxides react with water to form metal hydroxide.…

Q: An element X has the electron configuration [Kr] 5s-4d5p. The formula for the bromide of X is most…

A: The given electronic configuration is [Kr] 5s24d105p3. The atomic number of an element is equals to…

Q: The first four ionization energies of an element X are 578, 1817, 2745, and 11,577 kJ·mol–1. What is…

A: The number of valence electrons can be found in the element X using the ionisation energies  Since…

Q: Which pair of elements have the same number of valence electrons? A. O, Si B. He, Be C. Ne, Mg…

A: We have to find from the given options which pair of elements have the same number of valence…

Q: Lithium Oxide (Li2O) is a highly reactive chemical species which reacts to give electrons to other…

A: Lithium oxide (Li2O ) is highly reactive species.

Q: Write the symbol for the monatomic ion that has a charge of-1 and the condensed electron…

A: • We need to write the symbol for the monoatomic ion that has a charge of -1 and the condensed…

Q: Which of the following atoms and ions is largest: S2 - , S, O2 - ?

A: An atom is composed of three main sub-atomic particles; electrons, neutrons and protons. The atomic…

Q: Which of the following species has the lowest ionic radius? а. Ве Be 2+

A: Left to right in the periodic table, atomic size is decreases. Up to down in the periodic table,…

Q: The experimental Bi¬I bond length in bismuth triiodide,BiI3, is 2.81 Å. Based on this value and data…

A: The bond length of Bi-I = 2.81 A. The atomic radius of I = 1.39 A,

Q: (d) The nitride ion (N³), the oxide ion (O²) and the aluminum ion (Al*) are isoelectronic. (i) Why…

A: Isoelectronic species: The species (atoms or ions) having same number of electrons is known as…

Q: A main group element with the valence electron configuration 4s24p4 is in periodic group ______ .It…

A: The outer electronic configuration of the element is 4s2 4p4. This implies that it has 6 electrons…

Q: The first three ionization energies of an element X are 497, 4560, and 6911 kJ-mol-1. What is the…

A: Ans: X+…

Q: Give the electron configurations of these ions, and indicate which ones are isoelectronic. a) Ca2+…

A:

Q: How is F3O4 the oxide ion of Fe 3+?

A: SOLUTION: Step 1: Fe3O4 is a spinel compound. Spinel means it contains metal ion of 2 oxidation…

Q: (b) Cla reacts with the element Sr to form an ionic compound. Based on periodic properties, identify…

A: Strontium (Sr) belongs to group - 2 while chlorine(Cl2) belongs to group - 17

Q: The electron distribution of the -1 charged ion of the Cl atom is similar to that of which atom? O…

A: Given: Which atom will have similar electron distribution as that of the Cl atom with -1 charge.

Q: Considering only ions with charges of +1, +2, -1 and -2, or neutral atoms, give the symbols for 4…

A: Ans Cs is a group 1 metal. It contains 55 electrons when neutral. A Cs atom loses one electron to…

Q: 28. If the atomic number of an element X is 11 and that of nitrogen is 7, the most likely formula of…

A: 28. The atomic number of the element X is given 11. The element X with atomic number 11 is Sodium.…

Q: Which of the following atoms and ions is (are) isoelectronic with S2+: Si4+, Cl3+, Ar, As3+, Si,…

A: The species having the same number of electrons and also belong to different elements are named as…

Q: 5. Ch 8, Problem 56: Which compound in each of the following pairs of ionic substances has the most…

A:

Q: A neutral object is sketched below, in black and white. There are positive and negative electric…

A:

Q: Give the names and charges of the cation and anion ineach of the following compounds: (a) CuS, (b)…

A: The names and the charges of the cations are as follows:

Q: Fill in the systematic names of the following chemical compounds. Note: for compounds containing…

A:

Q: 2. The questions which follow, are based on equations used in the construction of the Born- Haber…

A: We can use Born-Haber cycle to find lattice energy for the formation of an ionic compound like MgO,…

Q: Give the most probable ion formed from each of the following elements.a. O c. Alb. Br

A: Most probable ion means the ionic state in which it is generally found. Ion is a charged species and…

Q: suggests that the unknown element is B) Si A) K C) As D) Ca E) S 5) Which of the following elements…

A: 5) Electron affinity: Electron affinity can be define as the amount of energy released or liberated…

Q: How many valence electrons are there in the bromine tetrafuoride ion, BrF4¯?

A:

Q: How many valence electrons are in the ion NO3-? (7

A: • We need to determine the total valence electrons in NO3- ion    • Nitrate, NO3- ion contains one…

Q: Since the first ionization energy of rubidium is +403 kJ mol, how many kJ of energy is it required…

A: Energy required calculation for cation formation from neutral atom :

Q: Group the following  ions into one of two groups based on the ion size compared to itsrespective…

A: Cations are formed when an atom loses its electron(s). So, when an atom forms a cation, the number…

Q: Which of the following is series of isoelectronic atoms and/or ions? OB, C, N, O O Sn, As, S, F O…

A:

Q: An element X reacts with hydrogen to form a compound of formula HX. In which group in the periodic…

A: An element X reacts with hydrogen to form a compound of the formula HX. In which group in the…

Q: An element Y reacts with Hydrogen to form a compound with a formula of HY. In which group in the…

A: An element Y reacts with Hydrogen to form a compound with a formula of HY. in HY, if we dissociate…

Q: The noble gas in the second period. O H2 O He 0.02 O Ne O Ar

A:

Q: The equation to calculate the energy of a two-electron atom or ion is: E (a) = a² – 2aZ + (a) What…

A: Given energy calculation equation,                   (a) The optimal value of alpha is given below,…

Q: What is the electron configuration of: Ag, Bi^2-, Rh^3+, Sn^3+, Si^-

A: The atomic number of Ag = 47. The atomic number of  Bi = 83 The atomic number of Rh =45 The atomic…

Q: What is the identity of the ion with an electron configuration [Xe]4f145d9 and has a charge of +4?

A: Ion is a charged molecule which is formed after the loss or gain in electron. Charge number of ion…

Q: 2. Which one of each of the following pairs has the higher ionization energy? Explain in detail for…

A: Which pairs having higher ionisation energy in each case ?

Q: 32. In which group do all the elements have similar chemical properties? a) P, S, Cl b) Ag, Cd, Ar…

A: 32.  The element present in the same group of the periodic table has the same chemical properties.…