What is the mass number of an atom?
Chemistry 1st Semester Final Review

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Chemistry
•
10th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The mass number is the total number of protons and neutrons in an atom's nucleus.
2.
FLASHCARD QUESTION
Front
How do you calculate the mass number of chlorine with 17 protons and 19 neutrons?
Back
Mass number = Protons + Neutrons = 17 + 19 = 36.
3.
FLASHCARD QUESTION
Front
What is the electron configuration ending for an element in group 14?
Back
The electron configuration ending for an element in group 14 is ns²np².
4.
FLASHCARD QUESTION
Front
What is the significance of valence electrons in chemical bonding?
Back
Valence electrons are involved in the formation of covalent bonds.
5.
FLASHCARD QUESTION
Front
What is electron shielding?
Back
Electron shielding is the phenomenon where inner electrons decrease the attraction between the nucleus and valence electrons.
6.
FLASHCARD QUESTION
Front
Which state of matter has a definite shape and volume?
Back
Solid.
7.
FLASHCARD QUESTION
Front
Define valence electrons.
Back
Valence electrons are the outermost electrons of an atom that are involved in chemical bonding.
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