What is the atomic radius?
Periodic Trends

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Chemistry, Science
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons. It generally increases down a group and decreases across a period.
2.
FLASHCARD QUESTION
Front
Which element has the largest atomic radius in Period 4?
Back
Potassium (K) has the largest atomic radius in Period 4.
3.
FLASHCARD QUESTION
Front
What is ionization energy?
Back
Ionization energy is the amount of energy required to remove an electron from an atom in its gaseous state.
4.
FLASHCARD QUESTION
Front
Which element has a lower ionization energy than Scandium (Sc)?
Back
Calcium (Ca) has a lower ionization energy than Scandium (Sc).
5.
FLASHCARD QUESTION
Front
What is a cation?
Back
A cation is a positively charged ion that forms when an atom loses one or more electrons.
6.
FLASHCARD QUESTION
Front
What is an anion?
Back
An anion is a negatively charged ion that forms when an atom gains one or more electrons.
7.
FLASHCARD QUESTION
Front
How does atomic radius change across a period?
Back
Atomic radius decreases across a period from left to right due to increasing nuclear charge, which pulls electrons closer to the nucleus.
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