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Why there is no d-block elements in the first period of the periodic table?
Wiki User
∙ 13y ago
Quantum numbers
1 s only
2 s and p only
3 s p and d only
4 s p d and f
Wiki User
∙ 13y ago
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The first period in the periodic table represents elements that possess only the first energy level s orbital therefore this period contains?
Two elements
The first period in the periodic table represents elements that possess only the first energy level s orbital therefore this period contains elements?
hydrogen and helium
Period in chemistry?
A period is a horizontal row on the periodic table of the elements. There are seven periods on the periodic table. Each period corresponds to the highest energy level that contains electrons. For example, the elements in the first period have electrons in the first energy level, which is the only energy level available; the elements in the second period have their highest energy electrons in the second energy level; the elements in the third period have their highest energy electrons in the third energy level, and so on.
How does the Bohr model of the atom relate to the Periodic Table?
The Bohr model of the atom places electrons in orbits or "shells." Elements in the first period only have electrons in the first shell. Elements in the second period have electrons in the first two shells. Elements in the third period have electrons in the first three shells, and so on.
Is xenon in the first period of the periodic table?
No. Xenon is not the first period of the periodic table. It is placed in the 5th period of periodic table.
What kind of shell does the first period in the periodic table have?
The first period of the periodic table's elements all have 1 energy level.
Does the periodic table explain the shell model or does the shell model explain the periodic table?
The shell model explains the organization of the periodic table. The elements in the first period have electrons in the first shell; the elements in the second period have electrons in the first two shells; the elements in the third period have electrons in the first three shells; and so on.
The first period in the periodic table represents elements that possess only the first energy level s orbital therefore this period contains?
Two elements
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
How many elements are in the 1st row of the periodic table?
In the Periodic Table of Elements there are: 118 Observed Elements 114 Officially Discovered Elements 112 Officially named Elements 92 Naturally Occuring Elements 83 Non-radioactive elements
The first period in the periodic table represents elements that possess only the first energy level s orbital therefore this period contains elements?
hydrogen and helium
First element locate in period 3?
The first element in period three of the periodic table of chemical elements is sodium (Na).
How many elements in first period of periodic table?
2. hydrogen and something else
Elements on very first Periodic Table?
Yes, there were elements on the first periodic table. I believe that there are still elements on the periodic table.
What group of elements in the periodic table is made up of elements that are gases at room temperature?
The elements in column 18 of a wide form periodic table or Column VIII of a narrow form periodic table, commonly called the noble gases. Also, both elements in the first period, the elements in groups 15, 16, and 17 of the second period, and the element in group 17 of the third period.
An element in the second row of the rare earth elements in the periodic table are?
litium, and elements in the 2nd period (row) are pretty common
How many elements occur in each of the first three periods or the periodic table?
There are 2 elements in the first period, 8, 8 elements in 2nd and 3rd periods respectively,
