Question

Which statements are true about the periodic table? Check all that apply. A. The periodic table is organized by atomic number. B. There are two different ways to number the groups of the periodic table. C. Each box on the table represents one element. D. Elements in the same row of the periodic table have the same number of electron shells.

Answer 1

Let's evaluate each answer closely:
A. The periodic table is organized by atomic number.
This statement is true the atomic number is what defines each element and is the number of protons and electrons in a neutral atom

B. There are two different ways to number the groups of the periodic table.
This is true.  The more modern method is to number the groups 1 - 18.  Earlier models used a Roman numeral and either an A or B to denote groups.
 
C. Each box on the table represents one element.
THis is also true.  Each box contains a unique element.

D. Elements in the same row of the periodic table have the same number of electron shells.
This is true.  The row that the element is on is also the number of electron shells that are in the element.

Answer 2

The true statements are:

• A. The periodic table is organized by atomic number.
• B. There are two different ways to number the groups of the periodic table.
• C. Each box on the table represents one element.

In a periodic table from top to bottom along a vertical column, it is a "group" in a periodic table.

• There are two different numbering systems that are commonly used to designate groups in roman numbers with A and B and 1 to 18.
• moving in a periodic table from left to right or in a horizontal row, atomic number increases.
• Each box represents an element and contains its atomic number
• The atomic number increases while moving from left to right as the number of rows and their orbitals in which the valence electron is found also increase in the same direction.

Thus, the true statements are - A, B, C.

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