Active 2 years, 7 months ago. Due to d 7 configuration, metallic bonds are weak. A. According to a book : the low melting point of manganese is due to half filled 3d subshell i.e due to its half filled state its more stable thus the electrons are not readily available for metallic bonding. D. None of these. of unpaired electrons which is genuinely found in Cr (3d 5 4s 1) but, after chromium, the pairing starts which decreases the melting point of manganese as Mn (3d 5 4s 2). Why doesn't the boiling point of an aqueous solution depend on intermolecular attraction? (1) of any material having a melting point (liquidus) of less than 1,000 degrees Fahrenheit, or (2) of any material having an ultimate tensile strength of less than 55,000 pounds per square inch, or (3) of any powdered metal having a density of less than 7.5 grams per cubic centimeter. Related. Manganese sulphide (MnS), which forms preferentially to FeS, has a high melting point and appears as discrete and randomly distributed globules. we expect the same effect in chromium but in chromium the smaller nuclear charge is not able to hold electrons as firmly as they are held in manganese thus one factor counters the other. In first transition series, the melting point of Mn is low because . In first transition series, the melting point of Mn is low because. As one would find from the file, Mn has LEAST values of atomization energy, the least mpt and least bpt among the 1st transition series elements. B. 16. Due to d … The melting point increases with increase in maximum no. Handguns (other than antique firearms) where the frame, barrel, cylinder, slide or breech-lock is composed of any material with a melting point of less than 1,000 degrees F, or an ultimate tensile strength of less than 55,000 psi, or comprised of any powdered metal having a density of less than 7.5 grams/cubic centimeter. C. Due to d 5 configuration, metallic bonds are weak. 1:38 12.4k LIKES. Steels with a Mn/S ratio of at least 8/1 do not exhibit hot shortness. § Mn improves hot workability by preventing the formation of low melting iron sulfide (FeS). Symbol: Mn Atomic Number: 25 Atomic Mass: 54.93805 amu Melting Point: 1245.0 °C (1518.15 K, 2273.0 °F) Boiling Point: 1962.0 °C (2235.15 K, 3563.6 °F) Number of Protons/Electrons: 25 Number of Neutrons: 30 Classification: Transition Metal Crystal Structure: Cubic Density @ 293 K: 7.43 g/cm 3 Color: silverish/grayish Atomic Structure Answer. ... Why in any transition series, melting points first increase and then decrease and also they show a dip in the middle? So, after Cr, the melting point starts to decrease. attachme nt (1).doc MEDIUM. Books. 5. Due to d 1 0 configuration, metallic bonds are strong. Ask Question Asked 2 years, 9 months ago. Trend in the melting point down the group. In first transition series, the melting point of Mn is low because . Why is the boiling point of polonium less than that of tellurium? Handguns (other than antique firearms) where the frame, barrel, cylinder, slide or breech-lock is composed of any material with a melting point of less than 1,000 degrees F, or an ultimate tensile strength of less than 55,000 psi, or comprised of any powdered metal having a density of less than 7.5 grams/cubic centimeter. 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