1. Syllabification
Single consonants are attached to the vowel that follows.
Two consonants are usually separated.
When a consonant is followed by l or r, both consonants are attached to the following vowel. However the combinations nl, rl, sl, nr, and sr are separated.
In groups of three or more consonants, or the one followed by l or r begins a syllable.
Adjacent strong vowels (a,e,o) form separate syllables.

2. Generally, when there is a combination of a strong vowel with a weak vowel (i,u), they form a diphthong and the stress falls on the strong vowel. However the diphthong may be broken when the stress falls in either of the weak vowels. Then the weak vowel carries a written accent.
When two weak vowels are together, the second of the two is stressed.