Sodium, an explosive soft metal, and chlorine, a greenish poisonous gas, form an ionic bond between them to create sodium chloride, or table salt. this statement demonstrates that ionic bonds create substances that have properties than the elements that created them.
a. similar b. different c. more d. less

B.) different

Explanation:

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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