What do you think is the reason for an increasing atomic radius within one group?
2 answers:
Periodic trends are patterns on the periodic table that
illustrate elements' characteristics.
Significant trends are atomic radius, metallic
reactivity, electronegativity, electron affinity, and
ionization energy.
Atomic radius and metallic reactivity trends:
They increase when they move down a group and left
across a period.
Electronegativity, electron affinity, and ionization
energy trends:
They increase when they move up a group and right
across a period.
illustrate elements' characteristics.
Significant trends are atomic radius, metallic
reactivity, electronegativity, electron affinity, and
ionization energy.
Atomic radius and metallic reactivity trends:
They increase when they move down a group and left
across a period.
Electronegativity, electron affinity, and ionization
energy trends:
They increase when they move up a group and right
across a period.
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Answer:
Mass percentage of gold : 33.35%
Mass percentage of silver: 62.80%
Mass percentage of copper : 3.85%
Explanation:
Where : N = Number of atoms
n = moles
= Avogadro number
Let the total atoms present in the alloy be 100.
Atom percentage of silver = 44.9%
Atoms of of silver = 44.9% of 100 atoms = 44.9
Atomic weight of silver = 107.87 g/mol
Mass of 44.9 silver atoms = 107.87 g/mol × 44.9 = 4,843.363 g/mol
Atom percentage of gold= 46.3%
Atoms of of gold = 46.3% of 100 atoms = 46.3
Atomic weight of gold = 196.97 g/mol
Mass of 44.9 gold atoms = 196.97 g/mol × 46.3 = 9,119.711 g/mol
Atom percentage of copper = 8.8 %
Atoms of of copper = 8.8% of 100 atoms = 8.8
Atomic weight of copper = 63.55 g/mol
Mass of 44.9 copper atoms = 63.55 g/mol × 8.8 = 559.24 g/mol
Total mass of an alloy :4,843.363 g/mol + 9,119.711 g/mol + 559.24 g/mol
Mass percentage of gold :
Mass percentage of silver:
Mass percentage of copper :