Chemical Bonding Quiz

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Questions and Answers

How many valence electrons does an atom of Selenium (Se) possess?

8
6 (correct)
2
4

Which of the following correctly represents the Lewis dot notation for a neutral phosphorus (P) atom?

:P:•
• P •• (correct)
•P:
•P•

Which of the following ionic compounds has the correct Lewis dot structure?

Li⁺ [ : F : ]⁻ (correct)
Ca⁺ [ : Cl : ]₂⁻
K⁺₂ [ : S : ]⁻²
[ Al ]⁺³ [ : N : ]⁻³

Based on electronegativity trends, arrange the following elements in order of increasing electronegativity: Te, Se, S, Po

<p>Po < Te < Se < S (C)</p> Signup and view all the answers

Given the electronegativity values: H=2.1, Cl=3.0, I=2.5; Which of the bonds is the most polar?

<p>H-Cl (B)</p> Signup and view all the answers

Flashcards

What are valence electrons?

Valence electrons represent the outermost electrons in an atom, and they are responsible for forming chemical bonds.

What is Lewis dot notation?

Lewis dot notation represents the valence electrons of an atom as dots around the atom's symbol. Each dot represents one valence electron.

What is electronegativity?

Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. Higher electronegativity values indicate stronger attraction.

What is a non-polar covalent bond?

A non-polar covalent bond is a bond between atoms with similar electronegativity values (same or very small difference), sharing electrons equally.

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What is an ionic bond?

An ionic bond is formed by the complete transfer of one or more electrons from a metal atom to a nonmetal atom. This creates ions with opposite charges that attract.

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Study Notes

Chemical Bonding

Valence Electrons:
- Cs has 1 valence electron
- Se has 6 valence electrons
- I has 7 valence electrons
- Ca has 2 valence electrons
Lewis Dot Notation (Elements):
- K: •K•
- P: •P•
- Cl: •Cl•
- B: •B•
- Br: •Br•
Lewis Dot Notation (Ions):
- Cs⁺: [ ]
- Sr²⁺: [ ]
- Si⁴⁺: [ ]
- As³⁻: [ ]
- Te²⁻: [ ]
- I⁻: •I•
Lewis Dot Structures (Compounds):
- LiF: Li⁺[ ] F⁻[ ]
- K₂S: 2K⁺[ ] S²⁻[ ]
- AlN: Al³⁺[ ] N³⁻[ ]
- CaCl₂: Ca²⁺[ ] 2Cl⁻[ ]
- Al₄C₃: 4Al³⁺[ ] 3C⁴⁻[ ]
- GaCl₃: Ga³⁺[ ] 3Cl⁻[ ]
- MgO: Mg²⁺[ ] O²⁻[ ]
- BeI₂: Be²⁺[ ] 2I⁻ [ ]
- KI: K⁺[ ] I⁻[ ]
- Mg₃N₂: 3Mg²⁺[ ] 2N³⁻[ ]
Electronegativity Order (increasing):
- Po, Te, Se, S
- Al, P, S, F
- B, C, N, O
Bond Types:
- Non-polar: identical atoms
- Polar: atoms with different electronegativity
- Ionic: large electronegativity difference
Most and Least Polar Bonds:
- Most Polar: H-F
- Least Polar: H-H

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Description

Test your understanding of chemical bonding concepts, including valence electrons, Lewis dot notation, and bond types. This quiz covers elements, ions, and compounds, as well as electronegativity trends. Challenge yourself and solidify your knowledge of these fundamental chemistry topics.