In our experiment, Magnesium should be heated or burned gradually in a closed crucible? اختر احدى الدجابات A. To avoid decomposition. B. To guarantee turning completely from shiny metal to grayish white powder. C. To form Mg,N, instead of Mg02. D. To form Mg(OH)2

Q: Why are Be and Mg metals used as deoxidizers?

A: Be and Mg metals are used as deoxidizers.

Q: Why does Ti5+ not exist?

A: Titanium is a transition element with atomic number 22. Ground state electronic configuration is 1s2…

Q: 109 1,000,000,000 nano n Calculate the % (mass/mass) composition, ppm, and ppt of Si in an alloy of…

A:

Q: Determine the oxidation number of lead in each ofthe following oxides:PbO, PbO2, Pb2O3, Pb3O4.(b)…

A: The oxidation number of lead in PbO O has oxidation number -2, and lead have x oxidation number  x…

Q: 1) What does number of bonding electrons per atom (e/a ratio) means? How does it affect the crystal…

A: Given: We have to tell how the number of bonding electrons per atom affect the crystal structure in…

Q: Magnesium is an active metal; it burns in the form of powder, ribbons, and filaments to provide…

A: Concept introduction: Magnesium (Mg) is an alkaline earth metal and belongs to group IIA in the…

Q: Lithium forms several useful organolithium compounds.Calculate the mass percent of Li in the…

A: Lithium stearate = C17H35COOLi Molar mass =

Q: Consider the figures above , which most likely to be silicon doped with Galium? * A B D В O c

A: Which likely Si doped with Ga?

Q: Carbon is used in countless ways in a modern automobile, with the most visible use being carbon…

A: Carbon fiber

Q: Fertilizers commonly contain compounds of which element? a) nitrogen b) aluminum c) fluorine d)…

A: Fertilizers are the chemical substances that provides to the crops or plants to increase their…

Q: What are the main principles of ?converting cast iron to steel

A: Ore is a mineral from which the metals are conveniently extracted in a profitable way. For example,…

Q: Determine the highest possible oxidation state for element. V

A: The term oxidation state is also referred to as oxidation number. It describes the degree of…

Q: How many electrons are in the valence d orbitals in thesetransition-metal ions? (a) Co3+, (b) Cu+,…

A: (a) The electron configuration of cobalt is [Ar]3d74s2. Cobalt loses three electrons to become Co3+.…

Q: sketch a diagram showing the formation of energy levels from the valence orbitals for Li, Li2, Li3,…

A: Diagram showing the formation of energy levels from the valence orbitals for Li, Li2, Li3, Li(n). On…

Q: * ?What is used to test for chlorine A a glowing splint O B damp litmus paper O C limewater D…

A: Chlorine is member of seventeen group elements, halogen group. It is a pale green gas and has a…

Q: What is the electron sea model for bonding in metals?

A: Ionic bonding involves transfer of e- and covalent bonding involves sharing of e- between atoms.

Q: 6g of magnesium chloride (MgCl2) is dissolved in 80g of water, calculate, (a) mass percentage of…

A:

Q: Using a band diagram explain why magnesium can be a metal even though its 3s level is full. Please…

A: The atomic number of magnesium is 12.The electronic configuration of Magnesium is written as…

Q: 14 A C D Consider the figures above , which most likely to be silicon doped with Galium? * O A B.

A: Semiconductors are materials that have a conductivity between conductors and nonconductors or…

Q: Using the idea of dobereiner’s trades, what conclusion could have been made about magnesium

A: According to dobereiner’s trades, average atomic mass of first and third elements give the atomic…

Q: Question six

A: Reduction of Nickel (II) oxide to Nickel Metal:

Q: Suppose that a semiconductor device is using a 10.51-mg sample of a hypothetical element By, that is…

A: Given: Mass of By = 10.51 mg = 0.01051 g                                 (Since 1 g = 1000 mg)…

Q: What is the role of (NH4)2HPO4? Give the balanced chemical equations for the reactions of Group IV…

A: 1. (NH4)2HPO4 (DAP): Diammonium phosphate is one of water soluble ammonium-phosphate salt. This salt…

Q: Consider the figures above , which most likely to be silicon doped with Antimony Sb? * B C A В D

A: Which is most likely Si doped with Sb?

Q: (a) What are the common oxidation states of the halogens?(b) Give an explanation based on electron…

A: To explain the oxidation state of the halogens

Q: What are the clinical uses of iron preparations? Explain the use of sulfuric acid in the analysis?

A: We have to describe the clinical uses of iron preparations and also explain the use of sulfuric…

Q: Why lithium only forms oxides but not peroxides?

A: The compound in which element is combined with oxygen atom is known as oxide. The oxidation state of…

Q: Which two sulfides can be dangerous to the human body?     A. azurite and cuprite     B.…

A: sulfides can be dangerous to the human body are

Q: What is the oxidation state of molybdenum in [n³-C6H6)Mo(CO)3]Cl? (atomic number of Mo is 42) a. +4…

A:

Q: a) Write the chemical name and chemical formula of a compound formed between an atom of group 1 A,…

A: a) The chemical name of the atom compound formed of the atom of group 1A period 4 and sulphate ion…

Q: Does roasting increase or decrease the mass of sulfides?

A: During the roasting of sulfide ores , sulfides are converted into oxides and sulfur is converted…

Q: Suppose that a semiconductor device is using a 10.51- mg sample of a hypothetical element By, that…

A: Mass of sample of By = 10.51 mg Molar mass of By = 26.274 g/mol No of atoms of Do in the sample = ?

Q: Burning of Magnesium with Oxygen produces white flame color and forms _.   a. MgO  b. O2   c. H2O…

A:

Q: Explain why fluorine is found only with the oxidation state of -1 or 0, while the other halogens are…

A: Fluorine in its elemental form has 0 oxidation state.

Q: Determine the oxidation state of the following: 1. O2 2. Cr in K2Cr2O7 3. S in MgSO4

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Which of the chemicals is necessary for halogenation?   a AlCl3   b SnCl2   c CuCl2   d NBS

A:

Q: ions are then oxidized to Fe3+ by 22.4 mL of 0.01 M K2C12O7. Calculate the percent by mass of Mn in…

A:

Q: AgBr + GAPO, →_Ag,PO, + GaBr, AIBr, + K,SO, → _ KBr + Al,(SO,),

A: The question is based on the concept of balancing the reaction    in first step of any calculations,…

Q: What is the number of coulombs required to electrolyze Au⁺(aq) to produce 3.50 mol Au? (F =…

A: To obtain Au from Au+ ions by electrolytic deposition, Au+ (aq) + e-→Au(s)

Q: What is the valence electron configuration for Group 4A elements? Group 4A contains two of the most…

A: In the periodic table, 4A group elements are those that have 4 electrons in the valence shell.…

Q: Although thermodynamically feasible, in practice, magnesium metal is not used for reduction of…

A: The objective of the question is to explain the reason that although thermodynamically feasible in…

Q: Which one of the following reactions is an example of nitrogen fixation? A. N2O5(g) = NO3(g) +…

A: Nitrogen fixation : This process is very essential for life because the fixed inorganic nitrogen…

Q: Suppose that a semiconductor device is using a 10.51-mg sample of a hypothetical element By, that is…

A:

Group 13 Elements

In the periodic table, group 13 elements exist in the first p-block. There are six elements present in group 13, which include boron (B), aluminum (Al), gallium (Ga), indium (In), thallium (Tl), and element 113 (ununtrium, (Uut)). Group 13 elements are also designated as the boron family.