Question

What property of an element determines its chemical behaviour?​

Answer 1

Answer:

Atomic number . The number of electrons and protons in an atom determines it's chemical properties.

Answer 2

Answer:

An element and its place within the periodic table are derived from this concept. When an atom is generally electrically neutral, the atomic number will equal the number of electrons in the atom, which can be found around the core. These electrons mainly determine the chemical behaviour of an atom.

Explanation:

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