Which of the following metals is the most chemically reactive?  : Sr, Mn, Be, or Cr  Which of the following nonmetals is the least chemically reactive? : N, P, B, or Cl

Q: Which of these are paramagnetic in their ground state?(a) Ga(b) Si(c) Be(d) Te

A: Interpretation: The elements that are paramagnetic in their ground state are to be determined.…

Q: HO- Na,Cr,07 H,SO,,HO

A: Cyclopentylmethanol on treatment with Na2Cr2O7/H2SO4, H2O produces cyclopentanecarboxylic acid.

Q: Write the electron configuration for the following: A) Fe*3 B) Cu*1 C) Co

A:

Q: Which element does NOT exhibit paramagnetism?   A. Sodium, Na   B. Iron, Fe   C. Calcium, Ca…

A: Paramagnetism is a property exhibited by the elements which have unpaired electrons present in their…

Q: Which element is a main-group metal? (a) O (b) Ag (c) P (d) Pb

A: a) O (b) Ag (c) P (d) Pb

Q: Which of the following has the lowest first ionization energy? Rb Si P Al S

A: as along the period the first ionisation increases and along with the group the first ionisation…

Q: what is the physical state of element Co? what is the physical appearance of element Co? what is…

A: Cobalt is a d - block element. It's atomic number is 27 and atomic mass is 58.933 g/mol. It is…

Q: Electron configuration of Fe+

A: The atomic number of iron is 26. It means a neutral atom of iron has 26 electrons. Electronic…

Q: (ii) Lithium shows a diagonal relationship with magnesium. A) Why are these elements diagonally…

A: Diagonal relationship :    A diagonal relationship is said to exist between certain pairs of…

Q: Is it possible for the number of Nat and K+ ions to be the same if No= 103 and Ko= 15? Explain %3D

A: The sodium and chloride ion concentrations are lower inside the cell than outside, and the potassium…

Q: What is the abbreviated electron configuration of the metal ion in Cr2(SO4)3 ?

A: Abbreviated electron configuration for metal ion Cr+3= [Ar]3d3

Q: 4. Which of the following elements is the least reactive metal? а. К C. Mn b. Ca d. Zn O A O c O D

A: Concept is based on Reactivity series of elements.

Q: d. 1. NaOCH, HCO H,CO OCH, 2. H,O H,CO OCH OCH, NH,OH H (cat)

A:

Q: Which atom has the same electron configuration as In? In3+? Ga Zn Pd Ir O Te

A: The element having same number of electrons as In3+ will have same electron configuration as In3+

Q: 3 Fe ions were formed. How many electrons were removed? Fe → Fe+3 + 3e

A: we have to calculate the number of electrons removed when 3 Fe ions are formed

Q: Which of the following is the correct relationship for the atomic radii?  Cl > Cl- K+ > K  O> S…

A: The correct relationship for the atomic radii is :-               (C) I->I.…

Q: Which one has the largest atomic radius?

A: Atomic radius is the distance from the centre of nucleus to the outermost shell of an atom. In a…

Q: Q2: Give the electron configurations for the following ions? Fe (Z=26) and Al * (Z=13)

A:

Q: Explain Atomic Species Balances?

A: An atomic balance is one in which we balance each individual atomic species rather than each…

Q: Write the electron configurations for both Ti (+4) and Ti(+3). Examine their electronic…

A:

Q: Which of the following elements would you expect to have the lowest first ionization energy? As Sb…

A: The atomic number increases as we go down the group. So, due to the increase in atomic number, the…

Q: Which of the following transition metals is most likely to form an oxide?  a gold  b silver  c…

A: Gold , silver, platinum and the copper are not formed oxides easily. Because they are least reactive…

Q: Which element, indicated by letter on the periodic table above, has a 2+ ion with the electron…

A:

Q: Which of the following species is the most paramagnetic:  K, Cr, Co, Ca, Fe3+

A: Given Elements : K, Cr, Co, Ca, Fe3+ First, write the electronic configuration of all elements. More…

Q: Is this true or false why? Sodium and chlorine are both very reactive metals

A: Sodium is metal but Cl is a non metal.

Q: loses an electron most easily? As • CI K F Part E is found in Group 7A (17), Period 3? As Cl • K F

A: The given elements Arsenic (As): Atomic number =33 Electronic configuration=1s22s22p63s23p64s23d10…

Q: Which of the following combination of elements is the most reactive? Cs and I Na and Br Cs and Br…

A: Greater is the difference in electronegativity between two atoms in a molecule, higher will be the…

Q: Transition that causes to the characteristic blue color of K, Re,Cl will be A) σ-σ B) 7 – 7* С) л —…

A:

Q: Which of the following species is the most paramagnetic:  K, Cr, Co, Ca, Fe3+       Select one:…

A: Paramagnetism of a substance can be explained as weak attraction towards external magnetic field by…

Q: Which items from the following list are diamagnetic? Mg, Mo, Si , Hg

A: in outermost shell orbitals contains. Unpaired electrons exhibit paramagnetism Atom or ion with All…

Q: Identify which of the following atoms would have the largest radius. A) Mg B) Mn C) Ba D) Bi E) Br

A: As we move from left to right in a period then radii decreases. As we move from top to bottom then…

Q: Which of the atoms listed below has the largest radius?       B     Ga     Br     Si…

A: Given,  B, Ga, Br, Si, Cl

Q: describe the properties of transition metals that make them important as biomolecules

A: Transition metals involve 'd' block elements. They play an important role in biological processes.…

Q: Fictional, thus not on the periodic table. Lz, a transition metal, forms the compound LzS₂ when…

A:

Q: The three of the four ions shown below have the same electron configuration, but the fourth does…

A: We have to tell which ion has different electronic configuration than other ions

Q: Which of the following pairs of elements have the most similar chemical properties?     O and N…

A: Elements that are present in same group have moat similar properties.

Q: in Example 4. Why do the transition elements exhibit higher enthalpies of atomisation? (N, R ne

A:

Q: Classify each element as a metal, a semimetal, or a nonmetal.    Ga, Ge, Sc, S, Sb, Bi,Se

A:

Q: Which of the following elements has the highest first ionization energy? Ве O Na Li Rb K

A:

Q: The atomic radii of lanthanides decrease from Ce to Lu, except for Eu and Yb because less electrons…

A: Applying concept of metalic bonding in Eu and Yb.

Q: Write  electron configurations for each of the following . a. Ti, Ti2+ Ti4+ b. Re,Re2+, Re3+ c. Ir,…

A: a. The atomic number for Ti is 22

Q: Which ionization process requires the most energy? A) Ga*(g) → Ga2+(g) + e° B) Ga(g) → Ga*(g) + e¨…

A: As we know that each successive Ionisation energy is greater than the previous one, because each…

Q: Write the electron configurations for each of the following elements and its ions:(a) Ti(b) Ti2+(c)…

A: (a) The atomic number of Ti is 22, so the number of electrons in Ti is 22. Hence, the electronic…

Q: 2) Write the full electron configuration for each ion. a) F b) K* c) Cu* *

A: The electron configuration of an atom is the representation of the arrangement of electrons…

Q: Which element listed below would have the lowest first ionization energy?   K Cl Ca Br Se

A: Electronic configuration refers to the systematic arrangement of electrons in the various shells and…

Q: Which of the following contains only metals?     Ag, As, Ba, Ca   Ag, Au, Pb, Rb   As, Ge, Si, Te…

A: Metal: Metals are situated on the left-hand side of the periodic table. The metals are…

Q: Which of the following elements has the highest first ionization energy? O Sr As K Se Ge

A:

Q: What is the effective nuclear charge felt by the valence electrons of titanium (Ti) atoms?

A: Effective nuclear charge is defined as the resultant positive charge that an electron felt in a…

Q: 3. Place the atoms and/or ions in order increasing atomic radius a. Cu, Cu*, Cu²+ b. S, S2-

A: Size of different atoms and ions depends on their number of protons  and number of electrons, which…

Q: Which of the following atoms has the largest radius? Li Cs Na K

A: The atomic size of an atom is directly proportional to the number of shells present in that atom. As…

Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.