Periodic Table and Atomic Structure Quiz

What is the purpose of visualizing the periodic table as distinct s, p, d, and f blocks?

• To determine an element's reactivity and chemical properties

• To write full electron configurations

• To identify the atomic structure of elements

• To predict the electron configuration of any element

Which element has the electron configuration [Ne]3s¹?

• Li

• Na

• K

• Rb

How many valence electrons does a sodium atom have?

• 1

• 2

• 3

• 4

Which group of elements have two electrons in the outer s subshell?

• Alkali metals

• Alkaline earth metals

• Halogens

• Noble gases

What is the electron configuration of chlorine (Cl)?

• [He]2s²2p³

• [Ne]3s²3p5

• [Ar]3d¹04s²4p

• [Kr]4d¹05s²5p5

Which group of elements have a full valence shell?

• Alkali metals

• Alkaline earth metals

• Halogens

• Noble gases

What is the net positive nuclear charge experienced by an electron in an atom called?

• Effective nuclear charge

• Shielding effect

• Core electrons

• Valence electrons

How does the effective nuclear charge change across a period?

• Increases from left to right

• Decreases from left to right

• Remains constant

• Varies randomly

Which element has the electron configuration [He]2s²2p4?

• O

• S

• N

• F

What is the shielding effect in an atom?

• The repulsion between core electrons

• The attraction between valence electrons and the nucleus

• The reduction in attractive force on valence electrons due to repulsion from core electrons

• The increase in attractive force on valence electrons due to repulsion from core electrons