Question

For the following set of atoms and ions, arrange the members in order of decreasing size: Rank items from largest to smallest. To rank items as equivalent, overlap them.

Co^{3+} , Fe^{3+}, Fe^{2+}

Answer #1

Atomic number of Co is 27 so the number of electrons are 27 and number of protons are 27

After removing 3 electrons we get Co3+ & it contains 24 e & 27 p

Fe3+ contains 23 e & 26 p

Fe2+ contains 24 e & 26 p

Among Fe2+ & Fe3+,both contains 26 p( as nuclear charge) but the number of electrons more in Fe2+ so the ionic radius of Fe2+ is more.

Among Fe2+ & Co3+ , both contain same number of electrons but the nuclear charge is more in Co3+ .

Therefore the order of ionic radius is : Fe2+ > Fe3+ > Co3+

Part A
Using the periodic table, arrange the atoms in the following set
from left to right in order of decreasing electronegativity.
Rank elements from largest electronegativity to smallest
electronegativity. To rank items as equivalent, overlap them.
F
Br
Cl
Part B
O
B
N
Part C
Mg
S
F

A) An atom's size is determined by how far the outermost
electrons are from the nucleus. The size of an atom is affected by
the size of an atom's orbitals as well as by the positive pull of
an atom's protons. Arrange the following elements in order of
decreasing atomic size. Rank the atoms from largest to smallest. To
rank items as equivalent, overlap them. Na, B, Ne, F, N. B) The
ionization energy of an atom is the energy...

Using only the periodic table, arrange each set of atoms in
order of decreasing radius.
Part A
Rank elements from largest atomic radius to smallest
atomic radius.
Na, Ra, and Sr:
Part B
Rank elements from largest atomic radius to smallest
atomic radius.
As, In, and Sn:
Part C
Rank elements from largest atomic radius to smallest
atomic radius.
Be, Si, and P:

Part B Arrange the following ionic compounds in order of
decreasing amount of energy released in lattice formation: LiF,
MgS, InN, and RbBr. Rank from greatest to least lattice energy. To
rank items as equivalent, overlap them.

Arrange the complexes in order of decreasing stability.
Rank from most stable to least stable. To rank items as
equivalent, overlap them.
[CuF6]2+
[Ni(en)3]2+
[Ni(en)(H2O)4]2+
[Ni(NH3)6]2+

Arrange the following atoms or ions in order of decreasing
ionization energy: Sr2+, Se2-, Rb+, Br-

Arrange the following elements in order of decreasing atomic
radius: Cs, Sn, Cl, Pb, and Se.
Rank elements from largest to smallest

1. Arrange the following elements in order of decreaing first
ionization energy starting with the highest.
S Ca F Rb Si
2. Arrange the ions in order of increasing ionic radius starting
with the smallest.
O2- N3- Mg2+ F- NA+
1. Arrange the following atoms in order of decreasing atomic
size starting with the largest.
Ca Rb S Si Ge F

Arrange the following species according to the number of
unpaired electrons they contain, starting with the one that has the
greatest number: Fe, Sc3+, Ti2+, Mn4+, Cr, Cu2+. Rank species
according to the number of unpaired electrons from greatest to
smallest. To rank items as equivalent, overlap them.

Arrange the five atoms- 42Ca, 39K, 44Sc, 37Ar, and 43Ti in order
of:
Increasing Mass (Smallest mass first)
Increasing number of electrons (smallest number of electrons
first)
Decreasing number of neutrons (Largest number of neutrons
first)
Decreasing number of protons (Largest number of protons
first)

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