Multiple Choice
How many electrons does a nitrogen atom need to gain in order to fill its outer (valence) shell?
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- 1. Intro to General Chemistry3h 46m
- Classification of Matter18m
- Physical & Chemical Changes19m
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- The Atom9m
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- Complex Ions5m
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- Magnetic Properties of Complex Ions: Octahedral Complexes11m
2. Atoms & Elements
The Atom
Multiple Choice
Which element has exactly 3 protons in its nucleus?
A
Helium
B
Lithium
C
Carbon
D
Boron
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Verified step by step guidance1
Recall that the number of protons in the nucleus of an atom defines the element's atomic number.
Identify the atomic number of each element given: Helium has 2 protons, Lithium has 3 protons, Boron has 5 protons, and Carbon has 6 protons.
Match the atomic number to the element with exactly 3 protons, which corresponds to Lithium.
Understand that the atomic number is unique to each element and determines its position on the periodic table.
Conclude that the element with exactly 3 protons in its nucleus is Lithium.
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