How are Hangul letters arranged into syllable blocks?

In the Hangul writing system, individual letters are organized into square blocks to represent syllables. This arrangement follows a specific structural pattern:

• Initial Consonant: Each block begins with an initial consonant. If a syllable starts with a vowel, a small circle is used as a "zero initial" placeholder.1
• Vowel Nucleus: Following the initial consonant, the vowel nucleus is placed either to the right or below the initial element (or both, depending on the vowel's shape).1
• Final Consonant: An optional final element, known as patch’im, can be placed at the bottom of the block to represent a final consonant or a cluster of two consonants.12

By grouping phonemes into these blocks, the script visually mimics the appearance of Chinese characters while maintaining its alphabetic nature.1