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

Chemical Bonds — Lesson quiz

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  • Questions count: 5
  • Passing grade: 60%
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1.
What type of bond is in sodium chloride NaCl?
A covalent bond
A metallic bond
A hydrogen bond
An ionic bond
2.
What type of bond is in a water molecule H₂O, and how many bonds does it contain?
A covalent bond, with two single bonds
An ionic bond, with one bond
A covalent bond, with three bonds
A metallic bond, with two double bonds
3.
Write the formula of the compound formed from Mg²⁺ and Cl⁻ ions.
MgCl
MgCl₂
Mg₂Cl
MgCl₃
4.
How many pairs of electrons are shared in a nitrogen molecule N₂?
One pair
Two pairs
Three pairs
Four pairs
5.
What does a metal atom usually form during a reaction?
A negative ion
A neutral molecule
A neutral atom with no change
A positive ion
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