State the Modern Periodic Law., The Modern Periodic Law states that the properties of elements are a periodic function of their atomic numbers., Who discovered that the atomic number is more fundamental than atomic mass, and in which year?, English physicist Henry Moseley in the year 1913., Name the four blocks of the Modern Periodic Table and specify which groups belong to the s-block and p-block., Four blocks: s-block, p-block, d-block, and f-block. ✮ s-block: Groups 1 and 2.✭p-block: Groups 13 to 18., How did the Modern Periodic Table solve the problem of placing isotopes?, Isotopes of an element have different atomic masses but identical atomic numbers ($Z$). Since the Modern Periodic Table is arranged by atomic number, all isotopes of an element occupy the same position., What is the significance of the zig-zag line in the p-block of the modern periodic table?, The zig-zag line separates metals from non-metals. The metalloid elements lie along the border of this line, traditional metals lie to its left, and non-metals lie to its right.

Modern Periodic table

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