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electron shells/engery levels

all of the elements in period one have one electron shell/engery levels

all of the elements in period two have two electron shells/engery levels etc.

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12y ago
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16y ago

Because the Periodic Table of the elements lists all the elements, each one being different, they have different numbers of everything. For any particular element on the table, however, atoms of that element contain exactly the same number of protons in their nuclei. They also have the same number of electrons flying around their nuclei when the atoms are in their uncharged (non-ionic) states. An element may have several different flavors -- called isotopes -- that have different numbers of neutrons in their nuclei.

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12y ago

They have the same number of shells.

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11y ago

They have the same number of Shells or energy levels.

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13y ago

It has the same number of electrons circling around the outer ring of the atom.

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12y ago

valence electrons

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12y ago

Non-valence electrons.

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Q: Elements of the same group on the periodic table have the same number of what?
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Each group has a group number.


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