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valentina_108 [34]
3 years ago
10

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. A physical change doe

sn’t break the bonds between atoms of a substance or form new ones. Compounds can be broken down by a chemical change. A chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. What simple substance would a compound break into? The basic elements that make it up! For example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. Which of the following is an example of a chemical change?
A
separating water into different glasses

B
breaking frozen ice cubes with a hammer

C
running an electric current through water

D
boiling water to evaporate it on a stove
Biology
2 answers:
artcher [175]3 years ago
8 0

Answer:

C because

Explanation:

<u>covalent bond and hydrogen bond</u> Are both present Here so that will be your answer

galina1969 [7]3 years ago
4 0

Answer:

c

Explanation:

covalent bond and hydrogen bond

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