Periodic table
Flashcard
•
Chemistry
•
11th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What are Halogens?
Back
Halogens are a group of highly reactive non-metals found in Group 17 of the periodic table, including elements like fluorine, chlorine, bromine, iodine, and astatine.
2.
FLASHCARD QUESTION
Front
What is a cation?
Back
A cation is a positively charged ion that has lost one or more electrons. For example, Na+1 is a cation.
3.
FLASHCARD QUESTION
Front
What is electron affinity?
Back
Electron affinity is the amount of energy released when an electron is added to a neutral atom, indicating how much an atom wants to gain an electron.
4.
FLASHCARD QUESTION
Front
How do anions compare in size to their parent atoms?
Back
Anions are larger than their parent atoms because the addition of electrons increases electron-electron repulsion, causing the electron cloud to expand.
5.
FLASHCARD QUESTION
Front
What is a common example of a cation?
Back
A common example of a cation is Ca+2, which indicates that calcium has lost two electrons.
6.
FLASHCARD QUESTION
Front
What is the trend of ionization energy across a period?
Back
Ionization energy generally increases across a period from left to right due to increasing nuclear charge, which holds electrons more tightly.
7.
FLASHCARD QUESTION
Front
What is the trend of atomic size down a group?
Back
Atomic size increases down a group in the periodic table due to the addition of electron shells, which outweighs the increase in nuclear charge.
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