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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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Elements of the same row 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
Are the elements sodium magnesium and silicon in the same period of elements?
yes
Elements that have the same number of valence electrons are?
All elements in the same group have the same number of valence electrons.
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 is the similarity that the elements in the same period have?
Elements in same period have same shell. The electron enters outermost shell.
Elements of the same row across?
the period
What do elements in same atomic period have?
Elements in the same period of the periodic table have sequentially increasing numbers of protons.
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 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
Are the elements sodium magnesium and silicon in the same period of elements?
yes
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
What three elements were named after the same place?
Einsteinium, Lawrencium, and Californium are three elements that were named after the same place.
Elements that have the same number of valence electrons are?
All elements in the same group have the same number of valence electrons.
