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1 row of 180 - 2 rows of 90 - 3 rows of 60 - 4 rows of 45 - 5 rows of 36 - 6 rows of 30 - 9 rows of 20 - 10 rows of 18 - 12 rows of 15 - 15 rows of 12 - 18 rows of 10 - 20 rows of 9 - 30 rows of 6 - 36 rows of 5 - 45 rows of 4 - 60 rows of 3 - 90 rows of 2 - 180 rows of 1 - total of 18 ways within the limits of the question

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Q: How many ways can 180 books be arranged in rows containing an equal number of books?

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All atoms are in the periodic table are arranged by their atom number, which is by definition equal to the number of protons in their nucleus.

It is equal to the atomic number. Elements are arranged according to atomic number in periodic table

2x+5x

Let x equal the number of books and let y equal the final number of books. (2/3)x=y

The groups are arranged according to the number of valence electrons. The elements in the same group has a same number of valence electrons. They have equal chemical properties.

The atomic number is equal to number of electrons for nuclear atom. Atomic number is also equal to number of protons.Elements are arranged in order of atomic number in periodic table.The atomic number is equivalent to the number of electrons the element has. One can deduce the group of an element thorough the atomic number. Therefore, the chemical properties of an element can be determined starting fro the atomic number.The atomic number of an element is equal to the number of electrons. This number is also equal to the number of protons. The periodic table is arranged according to the atomic numbers.

The elements are arranged according to the atomic number. The number of protons is equal to the atomic number.

20.

The big numbers are atomic numbers. They are equal to number of protons. Elements are arranged in order of increasing atomic number.

(1 + 3) = 4Is this the kind of thing you have in mind ?

The periodic table is arranged into Groups (i.e. columns) and Periods (rows). Now, each element is assigned an atomic number which is equal to the number of protons within its nucleus. Each element is then arranged in order of increasing atomic number from left to right. There is a more indepth answer relating to how the periodic table is arranged, however this is how they are "listed".

Decile means one of the ten groups containing an equal number of the items that make up a frequency distribution.

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