IGCSE /Grade 10
Science MCQ Based On Atomic number
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IGCSE Grade 10 Science Atomic number
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The halogens are the elements belonging to group 17 in the periodic table.
According to the modern periodic law, the properties of elements are a periodic function of their atomic numbers.
The horizontal rows in a periodic table are called periods.
Atomic structure
An atomic number is the identity of an element.
The atomic number is the difference between the number of nucleons and the number of neutrons.
Atomic number = Number of protons
An atomic number is a difference between the number of nucleons and the number of neutrons.
The element with atomic number 20 is calcium.
Isotopes and atomic number
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