What is a chemical change?
CrossChemACP2024FinalReview

Flashcard
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Chemistry
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A chemical change is a process where one or more substances are transformed into different substances with new chemical properties. Example: Burning a candle.
2.
FLASHCARD QUESTION
Front
What is the electron geometry of PH3?
Back
The electron geometry of PH3 is tetrahedral.
3.
FLASHCARD QUESTION
Front
What sublevel fills after 4f?
Back
The 5d sublevel fills after 4f.
4.
FLASHCARD QUESTION
Front
Which bond is least polar: H-F, H-S, H-N, or H-C?
Back
The bond H-C is the least polar.
5.
FLASHCARD QUESTION
Front
Which element has the smallest atomic radius: Rb, As, Li, or O?
Back
O (Oxygen) has the smallest atomic radius.
6.
FLASHCARD QUESTION
Front
Define electron geometry.
Back
Electron geometry refers to the spatial arrangement of all electron groups (bonding and lone pairs) around a central atom.
7.
FLASHCARD QUESTION
Front
What is the difference between a physical change and a chemical change?
Back
A physical change alters the form of a substance but not its chemical composition (e.g., melting ice), while a chemical change results in the formation of new substances (e.g., rusting iron).
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