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Twelfth Grade (Grade 12) Atomic Structure Questions

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Grade 12 Atomic Structure
How are isotopes of an element different from one another?
1. they have different numbers of electrons
2. they have different numbers of protons
3. they have different numbers of neutrons
4. they have different numbers of protons and neutrons
Grade 12 Atomic Structure
Positively-charged ions are called
1. anions
2. cations
3. electrons
4. protons
Grade 12 Atomic Structure
Grade 12 Atomic Structure
Grade 12 Atomic Structure
Which of the following hybridization does $IF_7$ undergo?
1. sp
2. $sp^(3)$
3. $sp^(3)d^(3)$
4. $sp^(2)$
Grade 12 Atomic Structure
Which of the following molecules undergoes sp hybridization?
1. $BeF_2$
2. $BF_3$
3. $CH_4$
4. $PCl_5$
Grade 12 Atomic Structure
According to Coulomb's law, the energy between an ion pair is inversely proportional to which of the following parameters?
1. Distance of separation (r)
2. Electronic charge (e)
3. Permittivity ($epsi_0$)
4. Ion pair $(Z^+Z^-)$
Grade 12 Atomic Structure
Grade 12 Atomic Structure
What is the bond angle of $BF_3$ molecule?
1. $180deg$
2. $120deg$
3. $72deg$
4. $90deg$
Grade 12 Atomic Structure
Grade 12 Atomic Structure
Why is the ionization potential of Nitrogen (atomic number 7) greater than that of Oxygen (atomic number 8)?
1. Because nitrogen is more stable than oxygen as its outermost valence shell is half-filled
2. Because nitrogen is less stable than oxygen as its valence shell is half filled
3. Because nitrogen is more stable than oxygen as its outermost valence shell is completely filled
4. Because nitrogen is more stable than oxygen as its valence shell is half filled
Grade 12 Atomic Structure
What is the bond angle of the compound that undergoes $sp^(3)$ hybridization?
1. $109.5deg$
2. $120deg$
3. $90deg$
4. $180deg$
Grade 12 Atomic Structure
Grade 12 Atomic Structure
Grade 12 Atomic Structure
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