What is the correct electron configuration of the element with atomic number 20
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Definition1/9
1s 2 2s 2 2p6 3s2 3p6 4s2
or
Ar 4s2 (Noble gas form)
In noble gas form, you go back to the noble gas (the last group
on the periodic table) prior to the element you are writing the
configuration for. The electron configuration is the same up until
that point. Then you write down the difference.
In this example, the electron configuration for Argon (Ar) is
1s2 2s2 2p6 3s2 3p6. If you fill up the shells until 4s2, you get
calcium. It's faster to abbreviate by saying "Ar 4s2"
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Term1/9
How does a full octet affect trends among the noble gases
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A full octet makes the noble gases nonreactive.
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How does the energy of core electrons compare with the energy of valence electrons
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The energy of the valence electrons is greater than the energy
of the core electrons.
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Term1/9
Which of the following elements shows little reactivity Fluorine Sulfur Potassium or Argon
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From the elements given, argon shows the least reactivity.
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What elements have the highest and lowest ionization energy
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Helium has the highest first ionization energy and francium has
the lowest first ionization energy.
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What elements has the least reactive metal
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magnesium (Mg)
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Which of the following elements is the smallest
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Definition1/9
question: which of the following elements is the smallest?
answer: chlorine (CI)
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Term1/9
Which statement is the best description of a chemical bond
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A chemical bond holds atoms together
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Cards in this guide (9)
What is a periodic trend
a numbering system for the periodic table.
Or a trend that periodically shows up.
What is the correct electron configuration of the element with atomic number 20
1s 2 2s 2 2p6 3s2 3p6 4s2
or
Ar 4s2 (Noble gas form)
In noble gas form, you go back to the noble gas (the last group
on the periodic table) prior to the element you are writing the
configuration for. The electron configuration is the same up until
that point. Then you write down the difference.
In this example, the electron configuration for Argon (Ar) is
1s2 2s2 2p6 3s2 3p6. If you fill up the shells until 4s2, you get
calcium. It's faster to abbreviate by saying "Ar 4s2"
How does a full octet affect trends among the noble gases
A full octet makes the noble gases nonreactive.
How does the energy of core electrons compare with the energy of valence electrons
The energy of the valence electrons is greater than the energy
of the core electrons.
Which of the following elements shows little reactivity Fluorine Sulfur Potassium or Argon
From the elements given, argon shows the least reactivity.
What elements have the highest and lowest ionization energy
Helium has the highest first ionization energy and francium has
the lowest first ionization energy.
What elements has the least reactive metal
magnesium (Mg)
Which of the following elements is the smallest
question: which of the following elements is the smallest?
answer: chlorine (CI)
Which statement is the best description of a chemical bond