OSAS Science Grade 11 Practice Questions - Oregon Statewide Assessment System - Science, Grade 11 Exam - OSAS Science Grade 11 Practice Questions - Oregon Statewide Assessment System

Question 1

A neutral atom of chlorine has mass number 35 and 17 protons. How many neutrons and electrons does this atom contain?

17 neutrons and 17 electrons 18 neutrons and 17 electrons 18 neutrons and 18 electrons 35 neutrons and 17 electrons

Correct Answer:

18 neutrons and 17 electrons

Question 2

Carbon-12 and carbon-14 are isotopes of the same element. Which statement correctly describes how they differ and what they share?

They have the same number of neutrons but different numbers of protons They have the same number of protons but different numbers of neutrons They have different numbers of protons and different numbers of electrons They have the same mass number but different numbers of protons

Correct Answer:

They have the same number of protons but different numbers of neutrons

Question 3

A student builds a model of a sodium atom showing 11 protons and electrons arranged in energy levels of 2, 8, and 1. When sodium forms a stable ion, which best explains the change using the model?

Sodium gains 7 electrons to fill its outermost level Sodium loses 1 electron to achieve a full outer level Sodium shares its 1 outer electron with another atom in an ionic bond Sodium gains 1 proton to become magnesium

Correct Answer:

Sodium loses 1 electron to achieve a full outer level

Question 4

Using the periodic table as a model, which trend correctly describes how atomic radius changes from left to right across a period?

Radius increases because atoms gain more neutrons Radius increases because atoms gain more electron shells Radius decreases because increasing nuclear charge pulls electrons closer Radius decreases because electrons are removed from the outer shell

Correct Answer:

Radius decreases because increasing nuclear charge pulls electrons closer

Question 5

A student records first ionization energies for three elements in the same period: Element X = 496 kJ/mol, Element Y = 738 kJ/mol, Element Z = 1520 kJ/mol. Which conclusion is best supported by this data?

Element Z is farthest to the left in the period Element X is a noble gas Element X loses an electron most easily of the three All three elements are in the same group

Correct Answer:

Element X loses an electron most easily of the three

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Prepare with the OSAS Science Grade 11 Practice Questions - Oregon Statewide Assessment System - Science, Grade 11 Exam practice quiz. This question bank includes 100 questions covering energy, reaction, student, population, and many. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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OSAS Science Grade 11 Practice Questions - Oregon Statewide Assessment System - Science, Grade 11 Exam

This practice set contains 100 questions from the matching question bank and focuses on energy, reaction, student, population, and many. 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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OSAS Science Grade 11 Practice Questions - Oregon Statewide Assessment System - Science, Grade 11 Exam

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