QQuestionChemistry
QuestionChemistry
How many valence electrons does hydrogen have?
A. 0
B. 1
C. 2
D. 3
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Answer
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Step 1:: Understand the problem
The problem asks for the number of valence electrons in a hydrogen atom. Valence electrons are the outermost electrons in an atom and are involved in the formation of chemical bonds with other atoms.
Step 2:: Recall relevant information
Hydrogen is in the first period of the periodic table and has an atomic number of 1. This means that there is only one proton in the nucleus and one electron orbiting around it.
Step 3:: Determine the number of valence electrons
Since hydrogen is in the first period, it has only one energy level. The sole electron in a hydrogen atom is in the 1s orbital, which is the lowest energy level and is also called the valence shell. Therefore, hydrogen has 1 valence electron.
Step 4:: Select the correct answer
Now that we know hydrogen has 1 valence electron, we can look at the answer choices and select the correct one: B. 1
Final Answer
Hydrogen has 1 valence electron.
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