How many electrons does Ba2+ have?
Chemistry A Unit 4 Practice Test

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Chemistry
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11th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
54 electrons. Ba2+ has lost 2 electrons from its neutral state (which has 56 electrons).
2.
FLASHCARD QUESTION
Front
What ion does nitrogen typically form?
Back
N-3. Nitrogen gains 3 electrons to achieve a stable electron configuration.
3.
FLASHCARD QUESTION
Front
Which elements have the most similar chemical properties?
Back
O and S. They are in the same group of the periodic table.
4.
FLASHCARD QUESTION
Front
How does electronegativity change across a period and down a group?
Back
Electronegativity increases across a period and decreases down a group.
5.
FLASHCARD QUESTION
Front
According to the octet rule, how many valence electrons do most elements need?
Back
8 valence electrons. Most elements strive to have a full outer shell.
6.
FLASHCARD QUESTION
Front
What is the octet rule?
Back
The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of 8 electrons.
7.
FLASHCARD QUESTION
Front
What is electronegativity?
Back
Electronegativity is the ability of an atom to attract electrons in a chemical bond.
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