hi~
There is a range of age appropriate development for speech (and other developmental skills). But please do keep an eye on it. A child can have speech only issues (thus they can hit all milestones except speech).
Here is some general info on language development...
6 MONTHS:
* Vocalization with intonation
* Responds to his name
* Responds to human voices without visual cues by turning his head and eyes
* Responds appropriately to friendly and angry tones
BY ONE YEAR
Milestones
• Recognizes name
• Says 2-3 words besides "mama" and "dada"
• Imitates familiar words
• Understands simple instructions
• Recognizes words as symbols for objects: Car - points to garage, cat - meows
Activities to encourage your child's language
• Respond to your child's coos, gurgles, and babbling
• Talk to your child as you care for him or her throughout the day
• Read colorful books to your child every day
• Tell nursery rhymes and sing songs
• Teach your child the names of everyday items and familiar people
• Take your child with you to new places and situations
• Play simple games with your child such as "peek-a-boo" and "pat-a-cake"
I would also add to help decrease tantrums:
1) always talk about everything as you are doing it (e.g. "mommy is taking (X) out of your hand because you can hurt yourself" or ""you have a dirty diaper. it is time to change you. when i count to 3 I am going to lay you down then take off your dirty diaper, clean you and put a new clean diaper on you. 1, 2, 3," )
2) provide warnings prior to moving him/picking him up so he knows what is going to happen
3) if you don’t already have a set routine – set one up so things are predictable for him
Here is additional information on speech and language from the American Speech and Language Association - http://www.asha.org/public/speech/development/