Analyze the chemical structures and terms presented on the blackboard.

Chemical Structures and Terms:

• Heading: "Алкены" (Alkenes)
• Structure: A branched chain with a double bond: C=C-C-C-C, with a "C" atom attached to the second carbon and another "C" atom attached to the fourth carbon.
• Term: "+2 алкена" (which translates to "+2 alkenes")
• Term: "1 циклоалкан" (which translates to "1 cycloalkane")
• Heading: "Алкины" (Alkynes)
• Structure: A branched chain with a triple bond: C≡C-C-C-, with a "C" atom attached to the third carbon and another "C" atom attached to the fourth carbon.
• Term: "+2 алкина" (which translates to "+2 alkynes")
• Term: "1 алкадиен" (which translates to "1 alkadiene")

General Terms:

• Top Left: "насыщенные" (saturated)
• Below "насыщенные": "Срывна" (likely a misspelling or colloquial term related to 'breaking' or 'unsaturation' in this context)