Answer:
New substances are produced by a chemical change
Answer:
A hydrocarbon containing a carbon - carbon double bond.
Explanation:
Alkene is hydrocarbon containing a
carbon - carbon double bond.
( Refer the attachment to understand more clearly )
Iron, Ruthenium, Osmium, and Hassium.
They're transition metals
In order of reactivity: magnesium, iron, copper, silver
Answer: B- Chemical bonds are formed. Energy is released in the form of heat.
Explanation: I hoped that helped !