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H and He are in the first period. Li Be, B, C, N, O, F, Ne are in the second and so on.

A period is one row across on the periodic table

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11y ago
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5mo ago

In the third period of the Periodic Table, the elements sodium, magnesium, and aluminum are found.

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Tanishka Navik

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H , Li , Na

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11y ago

eletrons

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Q: What are three elements in the same period?
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Related questions

What is the similarity that the elements in the same period have?

Elements in same period have same shell. The electron enters outermost shell.


Which periods have the same number of elements?

Period 4 and period 5 of the periodic table have the same number of elements. There are 18 elements in each period. While some elements in period 4 are calcium, iron, and zinc, elements in period 5 are tin, antimony, and iodine.


What does a period on the periodic table tell us?

Elements in the same period has same number of valence shells.There are 7 periods in Periodic Table.


What to all of the elements in period three have in common?

All elements in period three have three electron shells. They also have increasingly higher atomic numbers and exhibit a range of properties from nonmetals to metals as you move across the period.


What is the difference3 between a family of elements and elements in the same period?

a family is a column of elements a period is a row of elements


What is special about a period on the periodic table?

all elements in a period all have the same amount of shells example: all elements in period 1 has only 1 shell all elements in period 2 has 2 shells so the period number is the same as the number of shells in that period


What are elements in the same?

All elements in the same horizontal row of the Periodic Table are in the same period, there are 7 periods.


What are elements in the same column called?

the period


What elements in the same column called?

the period


Elements in the same period on the periodic table are very similar to each other?

Yes, elements in the same period on the periodic table have the same number of electron shells. This results in similar chemical properties among the elements in the same period, as they have comparable electron configurations.


A horizontal row of elements is called a?

On the Periodic table, horizontal rows are given the technical term "periods", while vertical columns are called "groups". Elements in the same period are similar in that they have the same number of energy levels.


Are any of the elements in the same family also in the same period?

No, elements in the same family are located in the same vertical column on the periodic table but are not in the same period. Periods are horizontal rows on the periodic table where elements have the same number of electron shells.