GCSE Chemistry - Electron Arrangement #8
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Chemistry
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9th - 10th Grade
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main reason atoms like sodium are considered unstable?
They have too many protons.
Their outer shell is not full.
Their inner shell is incomplete.
They have an excess of neutrons.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why do noble gases like neon not react with other elements?
They have more protons than electrons.
They lack neutrons in their nucleus.
They have an incomplete inner shell.
They have a full outer shell of electrons.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many electrons are in the outer shell of argon?
10
2
6
8
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to a calcium atom when it loses two electrons?
It gains two protons.
It becomes a calcium ion with a 2+ charge.
It forms a negative ion.
It becomes a neutral atom.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the electron configuration of calcium after it loses two electrons?
2, 8, 6
2, 8, 2
2, 8, 8, 2
2, 8, 8
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does fluorine achieve a stable electron configuration?
By losing one electron.
By gaining one electron.
By sharing electrons with another atom.
By losing two electrons.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What charge does a fluoride ion have after gaining an electron?
+1
+2
-1
0
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