BMST Atomic Structure and Bonding 3 ā Questions and Answers
Question 1: Which property measures an atom's ability to attract electrons in a bond?
- Ionization energy
- Electronegativity (Correct answer)
- Electron affinity
- Atomic radius
Correct answer: Electronegativity
Electronegativity is the measure of an atom's tendency to attract bonding electrons toward itself.
Question 2: How many electrons can the d subshell hold?
- 2
- 6
- 10 (Correct answer)
- 14
Correct answer: 10
The d subshell contains 5 orbitals, each holding 2 electrons, for a maximum of 10 electrons.
Question 3: What happens to an atom when it loses an electron?
- It becomes a negative ion (anion)
- It becomes a positive ion (cation) (Correct answer)
- It becomes a different element
- Its mass number decreases
Correct answer: It becomes a positive ion (cation)
Losing an electron leaves the atom with more protons than electrons, giving it a net positive charge (cation).
Question 4: Which type of bond is found in metals and involves a 'sea of electrons'?
- Ionic bond
- Covalent bond
- Metallic bond (Correct answer)
- Van der Waals bond
Correct answer: Metallic bond
Metallic bonding involves delocalized electrons that move freely among positively charged metal ions.
Question 5: In which region of the atom are protons and neutrons located?
- Electron cloud
- Orbital
- Nucleus (Correct answer)
- Valence shell
Correct answer: Nucleus
Protons and neutrons are densely packed in the nucleus at the center of the atom.
Question 6: A Lewis dot structure primarily represents which part of an atom?
- Core electrons
- Valence electrons (Correct answer)
- Neutrons
- Protons
Correct answer: Valence electrons
Lewis dot structures show valence (outermost shell) electrons because those are involved in bonding.
Question 7: Two atoms sharing three pairs of electrons form a:
- Single bond
- Double bond
- Triple bond (Correct answer)
- Ionic bond
Correct answer: Triple bond
Three shared electron pairs constitute a triple bond, as seen in molecules like Nā.
BMST Atomic Structure and Bonding 3
Which property measures an atom's ability to attract electrons in a bond?