Module 16: L2 ck - Atomic Mass

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Science
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What are isotopes?
Back
Isotopes are atoms of the same element that have different numbers of neutrons.
2.
FLASHCARD QUESTION
Front
How do isotopes of an element compare?
Back
They have different numbers of neutrons.
3.
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 of that element.
4.
FLASHCARD QUESTION
Front
What is the mass number of an element?
Back
The mass number is the total number of protons and neutrons in the nucleus of an atom.
5.
FLASHCARD QUESTION
Front
What is the atomic mass of an element?
Back
The atomic mass is the average mass of the atoms of that element.
6.
FLASHCARD QUESTION
Front
What is the mass of an electron compared to protons and neutrons?
Back
The mass of an electron is negligible.
7.
FLASHCARD QUESTION
Front
What defines the identity of an element?
Back
The identity of an element is defined by the number of protons in its nucleus.
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