Atomic Structure and Bonding Flashcards
7 cards from real BMST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Atomic Structure and Bonding flashcards as text
What does the principal quantum number (n) describe?
Answer: The energy level or shell of an electron
The principal quantum number n indicates the main energy level (shell) where an electron is found.
A coordinate covalent bond differs from a regular covalent bond because:
Answer: Both electrons are contributed by the same atom
In a coordinate (dative) covalent bond, one atom donates both electrons of the shared pair.
Which element has atomic number 6 and is the basis of organic chemistry?
Answer: Carbon
Carbon has atomic number 6 and its ability to form four bonds makes it the backbone of organic molecules.
When an atom gains an electron, it becomes a(n):
Answer: Anion
Gaining an electron gives the atom a net negative charge, making it a negatively charged ion called an anion.
Which subshell fills first: 3d or 4s?
Answer: 4s fills first
According to the Aufbau principle, 4s has lower energy than 3d and fills before it in electron configuration.
The bond angle in a water molecule (H₂O) is approximately:
Answer: 104.5°
Water's bond angle is about 104.5° because two lone pairs on oxygen repel the bonding pairs, compressing the angle.
Which of the following is an example of an ionic compound?
Answer: NaCl
NaCl (table salt) is an ionic compound formed by the transfer of an electron from sodium to chlorine.