This is my first question.

An isotope refers to elements with the same atomic number but different numbers of neutrons.

Rare earth elements are essential materials for the manufacture of electronic devices.

Transition elements play an important role in chemical reactions.

By learning phonetic symbols, accurate pronunciation becomes possible.

Can you tell me the phonetic symbol of this word?

Reading clefs is difficult.

The bass clef is one of the basic elements of music.

He is an expert in semiotics, and his theories are very profound.

What does this masu symbol mean?