Q. What is the electron configuration of a chlorine atom?
-
A.
1s2 2s2 2p6 3s2 3p5
-
B.
1s2 2s2 2p6 3s2 3p6
-
C.
1s2 2s2 2p6 3s2 3p4
-
D.
1s2 2s2 2p6 3s2 3p3
Solution
Chlorine has 17 electrons, and its electron configuration is 1s2 2s2 2p6 3s2 3p5.
Correct Answer:
A
— 1s2 2s2 2p6 3s2 3p5
Learn More →
Q. What is the principal quantum number for the outermost electron in a sodium atom?
Solution
The outermost electron in sodium (Na) is in the 3s orbital, which corresponds to a principal quantum number of n=3.
Correct Answer:
C
— 3
Learn More →
Q. What is the trend in electronegativity across a period in the periodic table?
-
A.
Increases
-
B.
Decreases
-
C.
Remains constant
-
D.
Fluctuates
Solution
Electronegativity increases across a period due to increasing nuclear charge, which attracts electrons more strongly.
Correct Answer:
A
— Increases
Learn More →
Showing 1 to 3 of 3 (1 Pages)
