QQuestionChemistry
QuestionChemistry
Iodine is in group 17 of the periodic table (sometimes referred to as group 7A). How many valence electrons does iodine have?
A. 5
B. 7
C. 1
D. 17
12 months agoReport content
Answer
Full Solution Locked
Sign in to view the complete step-by-step solution and unlock all study resources.
Step 1:I'll solve this step by step using the specified LaTeX formatting guidelines:
Step 2:: Understand Group Number and Valence Electrons
- Elements in the periodic table's groups have a predictable number of valence electrons - Group number corresponds to the number of valence electrons for main group elements (groups 1 - 2 and 13 - 18)
Step 3:: Identify the Group Number
- Iodine is in group 17 (also called group 7A) - For main group elements, the group number directly indicates valence electrons
Step 4:: Calculate Valence Electrons
- $$17 - 10 = 7$$ valence electrons
- This is because the group number (17) minus 10 equals the number of valence electrons
Step 5:: Verify the Answer
- Checking the given options, $$7$$ corresponds to option B
Final Answer
Explanation: Group 17 (7A) elements like iodine always have 7 valence electrons, which determines their chemical reactivity and bonding behavior.
Need Help with Homework?
Stuck on a difficult problem? We've got you covered:
- Post your question or upload an image
- Get instant step-by-step solutions
- Learn from our AI and community of students