Practice Chemical Bond in Chemistry

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

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Quick Recap

A lasting force of attraction between atoms that holds them together in molecules, compounds, or crystal lattices, formed when atoms share electrons (covalent bond), transfer electrons (ionic bond), or pool electrons (metallic bond).

The 'glue' that holds atoms together, made by sharing or transferring electrons.

Showing a random 20 of 50 problems.

Example 1

hard
Estimate ฮ”H\Delta H for H2+Cl2โ†’2HClH_2 + Cl_2 \to 2HCl given bond energies (kJ/mol): Hโ€“H 436, Clโ€“Cl 242, Hโ€“Cl 431.

Example 2

challenge
A solid does not conduct electricity when solid but conducts when molten, is brittle, and has a high melting point. What bond type is it, and why each clue fits?

Example 3

easy
Does forming a chemical bond release or absorb energy?

Example 4

easy
Will potassium (K) and bromine (Br) form an ionic or covalent bond? Explain.

Example 5

medium
Classify the bonding in copper metal (Cu) and explain its electrical conductivity.

Example 6

medium
How many electrons does N share in N2\text{N}_2?

Example 7

medium
Why is the bond in CO2\text{CO}_2 polar but the molecule nonpolar overall?

Example 8

easy
Name the two main bond types formed by sharing versus transferring electrons.

Example 9

medium
Predict the type of bond formed between: (a) Na and Cl, (b) H and O, (c) C and C. Use electronegativity values: Na = 0.9, Cl = 3.0, H = 2.1, O = 3.5, C = 2.5.

Example 10

hard
A solid is shiny, malleable, and conducts electricity in both solid and molten form. What bonding does it have?

Example 11

medium
Using electronegativities (H = 2.1, F = 4.0), classify the Hโ€“F bond.

Example 12

easy
What drives most atoms to form chemical bonds?

Example 13

hard
SiO2\text{SiO}_2 has a melting point near 1700 ยฐC while CO2\text{CO}_2 sublimes at -78 ยฐC. Both contain Group 14 elements bonded to O. Explain.

Example 14

hard
In benzene (C6H6C_6H_6), why do all Cโ€“C bond lengths equal each other, intermediate between single and double?

Example 15

medium
Why are metals malleable while ionic crystals are brittle?

Example 16

medium
Why do atoms form chemical bonds instead of always staying separate?

Example 17

medium
Order the bonds by typical strength: Hโ€“H, O=O, Nโ‰ก\equivN.

Example 18

easy
How many electrons are shared in a single covalent bond?

Example 19

easy
True or false: forming a chemical bond releases energy.

Example 20

medium
Why does diamond (pure carbon) have an extremely high melting point despite being covalent?
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