How is each element unique on the periodic table?

Answer 1

By their #"atomic numbers Z"#.

Each element is defined by a particular #"atomic number Z"#, where #Z# is the number of protons, massive, positively charged particles in the element's nucleus.

#Z=1#, #"the element is hydrogen"#; #Z=2#, #"the element is helium"#; #Z=3#, #"the element is lithium"#;........................................................#Z=23#, #"the element is vanadium"#.

Do you need to keep these numbers in mind?

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Answer 2

Ellie Andrews

The atomic number of an element determines the number of protons in its nucleus and, consequently, its chemical properties; other unique physical and chemical properties of each element on the periodic table include atomic mass, electron configuration, and reactivity.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.