USVI NGSS Science Grade 11 Practice Questions - U.S. Virgin Islands NGSS Science Summative Assessment, Grade 11 Exam - USVI NGSS Science Grade 11 Practice Questions - U.S. Virgin Islands NGSS Science Summative Assessment, Grade 11 Exam

Question 1

Which periodic trend explains why atomic radius generally decreases from left to right across a period in the periodic table?

Increasing effective nuclear charge pulls valence electrons closer to the nucleus Increasing electron shielding pushes outer electrons further away Decreasing number of protons weakens the attraction to valence electrons Increasing atomic mass expands the volume of the electron cloud

Correct Answer:

Increasing effective nuclear charge pulls valence electrons closer to the nucleus

Question 2

Elements in Group 17 (the halogens) have 7 valence electrons. What type of ion do they typically form during chemical bonding?

Anions with a -1 charge by gaining 1 electron Cations with a +1 charge by losing 1 electron Anions with a -7 charge by gaining 7 electrons Cations with a +7 charge by losing 7 electrons

Correct Answer:

Anions with a -1 charge by gaining 1 electron

Question 3

According to the balanced chemical equation 2 H2 + O2 -> 2 H2O, how many moles of water (H2O) are produced when 4.0 moles of hydrogen gas (H2) react completely with excess oxygen gas?

4.0 moles 2.0 moles 8.0 moles 1.0 mole

Correct Answer:

4.0 moles

Question 4

Water (H2O) has a boiling point of 100 °C, whereas hydrogen sulfide (H2S) has a boiling point of -60 °C. Which intermolecular force accounts for water's significantly higher boiling point?

Hydrogen bonding between polar H2O molecules London dispersion forces between nonpolar molecules Covalent bonding between hydrogen and oxygen atoms within the molecule Ionic attraction between free hydrogen and hydroxide ions

Correct Answer:

Hydrogen bonding between polar H2O molecules

Question 5

When methane (CH4) combusts in oxygen gas, heat is released to the surroundings. What can be concluded about the enthalpy change (delta H) and energy during this reaction?

The reaction is exothermic with a negative delta H because bond formation releases more energy than bond breaking absorbs The reaction is endothermic with a positive delta H because bond breaking releases energy into the surroundings The reaction is endothermic with a negative delta H because system temperature increases The reaction is exothermic with a positive delta H because total energy of the universe increases

Correct Answer:

The reaction is exothermic with a negative delta H because bond formation releases more energy than bond breaking absorbs

Question 1

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Prepare with the USVI NGSS Science Grade 11 Practice Questions - U.S. Virgin Islands NGSS Science Summative Assessment, Grade 11 Exam practice quiz. This question bank includes 100 questions covering energy, force, light, chemical, and reaction. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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USVI NGSS Science Grade 11 Practice Questions - U.S. Virgin Islands NGSS Science Summative Assessment, Grade 11 Exam

This practice set contains 100 questions from the matching question bank and focuses on energy, force, light, chemical, and reaction. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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USVI NGSS Science Grade 11 Practice Questions - U.S. Virgin Islands NGSS Science Summative Assessment, Grade 11 Exam

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