What is an ion?
Ions and Isotopes

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Science
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7th - 8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.
2.
FLASHCARD QUESTION
Front
What is an isotope?
Back
Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.
3.
FLASHCARD QUESTION
Front
How do you calculate the mass number of an atom?
Back
The mass number is calculated by adding the number of protons and neutrons in the nucleus of an atom.
4.
FLASHCARD QUESTION
Front
If an atom has 10 protons and 9 neutrons, what is its mass number?
Back
19
5.
FLASHCARD QUESTION
Front
What charge does an atom have if it gains an electron?
Back
Negative (-) charge.
6.
FLASHCARD QUESTION
Front
What charge does an atom have if it loses an electron?
Back
Positive (+) charge.
7.
FLASHCARD QUESTION
Front
What do ions and isotopes have in common?
Back
Both involve a change in the properties of the atom.
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