Features of Hangul

1) Hangul reads in order of be written.

2) Korean has only one sound per letter.

3) Korean use only one vowel per one letter.

4) Left -> Right: Consonant on the left + Vowel on the right
  The vowels of the 'ㅏ, ㅑ, ㅓ, ㅕ, ㅣ' series has consonants come to the left of vowel.
  ex) 가,  야,  너,  며,  비  

5) Above -> Below: Consonant be used above of Vowel.
  The vowels of the 'ㅗ, ㅛ, ㅜ, ㅠ, ㅡ' series has consonant come to the top of vowel.
  ex)  도,  교,  수,  유,  크

6) Left -> right -> down : Consonant on the left, vowel on the right and other consonant be beneath them. 
  ex) 강,  약,  먼,  형,  빗

7) Above -> middle -> below: It has consonant above, vowel in the middle and a consonant be beneath them.
  ex)  곰, 욕, 눈, 융, 흠 

8) Left -> Right -> Below (2 consonants): It has Consonant on the left, vowels on the right, and two consonants below it. And the two consonants below are left and right.
  ex) 닭,  넋,  밝

9) Above -> middle -> below (2 consonants): It has consonant above, vowel in the middle and a two consonant be beneath them. The two consonants below are on the left and right.
  ex) 몫, 흙

10) The consonants that after the vowel in Hangul are all called 'batchim'.