Ontario Grade 9 Science Class Practice Exam

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What is a chemical family?

A group of scientists related by blood or marriage
A set of chemical reactions that share a common feature
A column of elements with similar properties on the periodic table
A laboratory group specializing in chemistry

The correct answer is: A column of elements with similar properties on the periodic table

A chemical family refers to a specific group of elements on the periodic table that share similar chemical and physical properties. These properties are determined by the elements' outermost electron configuration. Option A is incorrect because it refers to people instead of elements. Option B is incorrect because a chemical family is not a set of reactions, but rather a group of elements. Option D is also incorrect because it refers to a specific group of people working in a laboratory, not a group of elements. Therefore, the correct answer is C as it accurately describes the concept of a chemical family.