CH-1177
Electronic configuration
Chemistry · Secondary 4 · Hard · Electronic configuration
Element Q has electronic configuration . Element R has electronic configuration .
Which statement about Q and R is correct?
Which statement about Q and R is correct?
- Both are noble gases.
- Both form negative ions.
- Q is in Group 7 and R is in Group 1.
- Q is in Period 4 and R is in Period 3.
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