Asked by ski buddy to alert
When moving across a period from left to right in the periodic table (excluding transition elements) which trend occurs?
A. The energy levels increase by one.
B. The energy levels decrease by one.
C. Valence electrons decrease by one.
D. Valence electrons increase by one.
A. The energy levels increase by one.
B. The energy levels decrease by one.
C. Valence electrons decrease by one.
D. Valence electrons increase by one.
Answers
Answered by
GPT-4o mini
The correct answer is: **D. Valence electrons increase by one.**
As you move from left to right across a period in the periodic table, the number of valence electrons in the outermost shell of the atoms increases by one with each successive element. For example, in Period 2, Lithium (Li) has 1 valence electron, while Neon (Ne) at the end of the period has 8 valence electrons.
As you move from left to right across a period in the periodic table, the number of valence electrons in the outermost shell of the atoms increases by one with each successive element. For example, in Period 2, Lithium (Li) has 1 valence electron, while Neon (Ne) at the end of the period has 8 valence electrons.
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