CLASS 8 · LEARNING KNOWLEDGE
Atomic number and periodic table: basic principles
How it works
The atomic number of an element indicates the number of protons in the atomic nucleus and thus determines the position of the element in the periodic table. The periodic table is ordered by increasing atomic number. Elements with similar chemical properties are in a group (column). The periods (rows) show the number of electron shells. The atomic number uniquely distinguishes the elements from one another.
Note
The atomic number corresponds to the number of protons of an element and determines its place in the periodic table. Elements are arranged by increasing atomic number; elements in a group have similar properties.
The atomic number corresponds to the number of protons of an element and determines its place in the periodic table. Elements are arranged by increasing atomic number; elements in a group have similar properties.
An example
Which particle in the atom determines the atomic number of an element?
The atomic number is determined by the number of protons in the atomic nucleus. Protons are positively charged particles in the nucleus. The number of neutrons or electrons can vary, but the atomic number remains the same.
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50 Exercises
To the learning unit →Own explanation and own practice exercises by AmyMath. Subject reference framework: Chemistry. The topic assignment may vary by federal state.