The larger ion among the pair S − 2 and Cl − should be determined. Concept introduction: Atomic radii of atoms of elements down the group increase as Z increases because new shells are introduced and therefore the distance between nucleus and valence shell increases. Along a period, size or radii decreases as the electrons are introduced into the same shell and are pulled by higher nuclear charge.
The larger ion among the pair S − 2 and Cl − should be determined. Concept introduction: Atomic radii of atoms of elements down the group increase as Z increases because new shells are introduced and therefore the distance between nucleus and valence shell increases. Along a period, size or radii decreases as the electrons are introduced into the same shell and are pulled by higher nuclear charge.
Definition Definition Number of protons in the nucleus of an atom. It uniquely identifies an element, as the number of protons determines the element's properties. The periodic table of elements is arranged based on increasing atomic numbers, allowing scientists to easily locate and study elements.
Chapter 5, Problem 36P
a)
Interpretation Introduction
Interpretation: The larger ion among the pair S−2 and Cl− should be determined.
Concept introduction: Atomic radii of atoms of elements down the group increase as Z increases because new shells are introduced and therefore the distance between nucleus and valence shell increases. Along a period, size or radii decreases as the electrons are introduced into the same shell and are pulled by higher nuclear charge.
b)
Interpretation Introduction
Interpretation: The larger ions among the pair Tl+ and Tl+3 should be determined.
Concept introduction: Atomic radii of atoms of elements down the group increase as Z increases because new shells are introduced and therefore the distance between nucleus and valence shell increases. Along a period, size or radii decreases as the electrons are introduced into the same shell and are pulled by higher nuclear charge.
c)
Interpretation Introduction
Interpretation: The larger ion among the pair Ce+3 and Dy+3 should be determined.
Concept introduction: Atomic radii of atoms of elements down the group increase as Z increases because new shells are introduced and therefore the distance between nucleus and valence shell increases. Along a period, size or radii decreases as the electrons are introduced into the same shell and are pulled by higher nuclear charge.
d)
Interpretation Introduction
Interpretation: The larger ions among the pair S−2 and I− should be determined.
Concept introduction: Atomic radii of atoms of elements down the group increases as Z increases because new shells are introduced and therefore the distance between nucleus and valence shell increases. Along a period, size or radii decreases as the electrons are introduced into the same shell and are pulled by higher nuclear charge.
27) Draw the energy level diagram and write the full and shorthand electron configuration for a neutral
sulfur atom.
Indicate whether these compounds are isomers, enantiomers, or tautomers.
OCH
OCH
محمد ممد
30) Substance A to E below are listed with several of their properties. The identities of the substances are
identified in random order below:
Iron, ethane, ethanol, sodium nitrate, graphite
First classify each substance as either a polar covalent compound, non-polar covalent compound, ionic
compound, metallic solid, or network solid. Write your predictions in the sixth coloumn of the chart,
under "type of substance." Then, identify the identity of the substance in the last coloumn.
Substance
Melting
Point
Boiling
Point
Solubility in
H₂O
Electrical
Conductivity
Type of
Substance
Identity of
Substance
(°C)
(°C)
as: Solid,
Liquids,
Solution
A
-182
-88
Insoluble
No/No/-
B
1538
2862
Insoluble
Yes/Yes/-
C
308
380
Soluble
Yes/Yes/Yes
Ꭰ
3456
Insoluble
No/-/-
E
-114
78
Soluble
No/No/No
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