Question detail

Which of the following elements is NOT one of the first 20 elements in the periodic table?

Try the question, check the answer, then read the explanation to understand the curriculum point.

At a glance

MCQ

Type

practice

Style

Topic

A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes

Question

Zinc

Zinc is the 30th element in the periodic table, while Calcium, Iron, and Bromine are among the first 20 elements.

Misidentifying Element Symbols

Students often confuse the symbols of elements, such as writing 'O' for sodium instead of 'Na'.

To fix this, students should memorize the correct symbols for the first 20 elements and practice using them in context.

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