Does it make sense that LiH is more stable than other Group 1 hydride compounds?  (Choose the best answer.) YES - Lithium has the least covalent character of any of the Group 1 metals.   YES - Li+ is the smallest (hardest) of the Group 1 cations and hydride is a small (hard) anion.   NO - Lithium has a very high density compared to other Group 1 metals.   NO - Because of their similar sizes, Li+ and hydride ions should not interact very strongly.

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Q: Using the thermodynamic tables find the enthalpy of formation for H2O (l). a. – 1.29 x 103 kJ/mol…

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Q: Draw a single resonance hybrid structure for SiO32-

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Q: The common hydrate of magnesium sulfate is heptahydrate, MgSO4∙7H2O. In the crystal structure, how…

A: Magnesium sulfate is also known as epsom..(MgSO4.7H2O)..

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Q: Silicon carbide (SiC) is an extremely hard substance used in bullet proof vests and other hard…

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

A:

Q: Element Atomic Atomic Radius E- configuration ( short Boiling Melting Standard 1st Point in…

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Q: The most electronegative element on the periodic table is: fluorine carbon O helium neon O hydrogen…

A:

Q: Which is more electronegative, oxygen or sulfur?

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Q: Fluorine lies between oxygen and neon in Period 2. Whereas atomic sizes and ionization energies of…

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Q: Which of the following compounds would you expect to have the lowest melting point? CaO H2O Na2O…

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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.

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Q: Describe the trend for second-period hydrides. Why is this trend observed?

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A: Due to technical error ,unable to provide you the solution. Please resubmit the question once again

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A:

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Q: Using the thermodynamic tables find the enthalpy of formation for BaCO3 (s). a. + 314.4 kJ b. – 1219…

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A: Boron-hydrogen-boron  bridge bond is a 2 electron bond and is called 3-center , 2-electron bond

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A: A cation and anion make bond with each other.

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A:

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Q: Arrange the nonmetal elements of period 3 in order of decreasing melting point.

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Q: How do you draw the lewis structure of BN2? Boron, nitrogen

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Group 15 elements

The elements of group 15 are phosphorus, nitrogen, bismuth antimony, and arsenic. The most abundant element which is present in the air is nitrogen and the percentage of nitrogen present in the air is 78%. In the free state, the elemental nitrogen is present as diatomic gas (N2). In the organic matter obtained from plants and animals, phosphorus is the dominant element present. In nucleic acids, phosphate groups are present. Phosphates are also found in teeth and bones. The other elements arsenic, bismuth, and antimony are found as sulfides. Arsenopyrite, bismuth glance, and stibnite are examples of sulfides of arsenic, bismuth, and antimony respectively.