Warm Up (12-16-24)
Flashcard
•
Chemistry
•
10th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the atomic number of an element?
Back
The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.
2.
FLASHCARD QUESTION
Front
How many valence electrons does an element with atomic number 15 have?
Back
An element with atomic number 15 (Phosphorus) has 5 valence electrons.
3.
FLASHCARD QUESTION
Front
What is the electron configuration for chlorine (atomic number 17)?
Back
The electron configuration for chlorine is 2, 8, 7, meaning it has 2 electrons in the first shell, 8 in the second, and 7 in the third.
4.
FLASHCARD QUESTION
Front
How many unpaired electrons does sulfur have?
Back
Sulfur has 2 unpaired electrons.
5.
FLASHCARD QUESTION
Front
What does the Bohr model of the atom state about electron motion?
Back
The Bohr model assumes that all electrons move in circular orbits around the nucleus.
6.
FLASHCARD QUESTION
Front
How many electrons does a neutral atom of argon have?
Back
A neutral atom of argon has 18 electrons.
7.
FLASHCARD QUESTION
Front
What is the significance of valence electrons in chemical bonding?
Back
Valence electrons are the outermost electrons and are involved in forming bonds with other atoms.
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