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WorksheetsS3 Chem - Molecules and Covalent Bond
Total questions: 15
Worksheet time: 5mins
What are molecules composed of?
Atomic nucleus
Protons and neutrons
Two or more atoms bonded chemically
Electrons and protons
How is a covalent bond formed?
Electron transfer
Electrostatic attraction
Attraction between atomic nuclei
Sharing of electron pairs between atoms
Which of the following substances is a molecule formed by covalent bonds?
Sodium chloride
Magnesium
Carbon dioxide
Copper sulphate
In a chlorine molecule (Cl₂), how many covalent bonds are formed between the two chlorine atoms?
One
Two
Three
None
Which of the following molecules contains a double bond?
Water (H2O)
Ammonia (NH3)
Oxygen (O2)
Methane (CH4)
Which of the following molecules contains a triple bond?
Hydrogen (H2)
Nitrogen (N2)
Carbon dioxide (CO2)
Ethane (CH4)
Which of the following properties are typically associated with covalent compounds?
High melting and boiling points
Conductivity
Solubility in water
Low melting and boiling points
Which of the following is NOT an example of a covalent compound?
carbon dioxide (CO2)
nitrogen (N2)
sodium chloride (NaCl)
Water (H2O)
In a methane (CH4) molecule, what type of bond is formed between the carbon atom and each hydrogen atom?
Ionic bond
Metallic bond
Single covalent bond
Double covalent bond
In the ammonia (NH3) molecule, how many outermost shell electrons of the nitrogen atom participate in forming covalent bonds?
3
5
8
2
Which of the following factors is related to the strength of a covalent bond?
Color of the molecule
Size of the atomic nucleus
Number of shared electron pairs
Mass of the molecule
Compared to simple molecular solids, covalent network solids usually have a higher?
Solubility
Conductivity
Volatility
Melting point
Graphite and diamond are both composed of carbon atoms, but their physical properties differ greatly mainly because?
The types of carbon atoms are different
The number of carbon atoms is different
The arrangement of carbon atoms is different
The types of bonds formed between carbon atoms are different
Which of the following descriptions best encapsulates the nature of a covalent bond?
Attraction between positive and negative charges between atoms
Exchange of protons and neutrons between atoms
Sharing of electrons between atoms to achieve a stable electron configuration
Complete transfer of electrons between atoms
Which of the following elements is most likely to form a covalent bond with chlorine?
Sodium
Potassium
Argon
Oxygen
