Curriculum
Course: Science — First Preparatory
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Curriculum

Science — First Preparatory

Unit 1: Matter

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Unit 2: Forces

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Unit 3: Life

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Unit 4: Earth and Space

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Quiz

Structure of the Atom — Lesson quiz

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  • Questions count: 2
  • Passing grade: 60%
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1.
How many electrons does the sodium ion Na⁺ have?
11 electrons
12 electrons
10 electrons
9 electrons
2.
What is the maximum number of electrons the second level can hold in the first 20 elements?
2 electrons
18 electrons
10 electrons
8 electrons
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