The rolls in the table are called periods . which characteristic of the elements increases as you move across a period from left to right ?

The rolls in the table are called periods which characteristic of the elements increases as you move across a period from left to right class=

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Answer:

A. atomic number

Explanation:

An atomic number of the elements increases as you move across a period from left to right. Hence, option A is correct.

What is an atomic number?

An atomic number is the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing the number of protons in the nucleus.

In a period atomic number increases as we move from left to right but the outermost shell remains the same. Hence it's only the number of protons increasing in the nucleus as we from left to right, the effect of the nucleus increases on the outermost shell hence atomic size decreases in a period.

Hence, The atomic number of the elements increases as you move across a period from left to right.

Learn more about the atomic number here:

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