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11th Grade Chemistry: Important Questions

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11th Grade Chemistry: Important Questions

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Questions and Answers

Which of the following is NOT a characteristic of a chemical element?

It consists of only one type of atom

It is listed in the periodic table

It can be broken down into simpler substances (correct)

It cannot be chemically transformed into a different element

What is the total number of valence electrons in the sulfur atom?

8 (correct)

What is the main role of a catalyst in a chemical reaction?

To increase the activation energy of the reaction

To lower the activation energy of the reaction (correct)

To change the stoichiometry of the reaction

To reduce the rate of the reaction

Which of the following statements is true about the octet rule?

Transition metals do not follow the octet rule Signup and view all the answers

What is the significance of electronegativity in chemical bonding?

High electronegativity difference leads to nonpolar covalent bonding Signup and view all the answers

What is the relationship between bond length and bond energy?

Bond length and bond energy are inversely proportional Signup and view all the answers

What is the relationship between the atomic number and the number of protons in a chemical element?

They are equal to each other Signup and view all the answers

What property of an element does the group number in the periodic table indicate?

Number of valence electrons Signup and view all the answers

What is the significance of the Pauli exclusion principle in determining the electron configuration of an atom?

It limits the maximum number of electrons that can occupy a single orbital Signup and view all the answers