Practice Quiz: Chemistry Final Prep (Revised)

What is the correct ground state electron configuration for a neutral atom of Oxygen (O)?

• 1s22s22p2

• 1s22s22p6

• 1s22s22p4

• 1s22s42p2

Tags

NGSS.HS-PS1-1

Which element has the electron configuration 1s22s22p63s23p64s23d104p5?

• Bromine (Br)

• Chlorine (Cl)

• Iodine (I)

• Krypton (Kr)

Tags

NGSS.HS-PS1-1

How many valence electrons does a neutral atom of Aluminum (Al) have?

• 13

• 1

• 3

• 5

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which orbital is characterized by a dumbbell shape?

• s orbital

• p orbital

• d orbital

• f orbital

What is the electron configuration of a S2– ion?

• 1s22s22p63s23p2

• 1s22s22p63s23p4

• 1s22s22p63s23p6

• 1s22s22p63s2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

According to Hund's Rule, electrons in orbitals of the same subshell:

• Pair up before all orbitals are half-filled.

• Must have opposite spins when in the same orbital.

• Occupy orbitals singly before pairing up.

• Fill the lowest energy orbitals first仿佛

Which of the following elements has the largest atomic radius?

• Fluorine (F)

• Lithium (Li)

• Cesium (Cs)

• Carbon (C)

Which of these elements possesses the highest first ionization energy?

• Sodium (Na)

• Silicon (Si)

• Sulfur (S)

• Helium (He)

Tags

NGSS.HS-PS1-1

Which element exhibits the highest electronegativity?

• Oxygen (O)

• Fluorine (F)

• Chlorine (Cl)

• Nitrogen (N)

Why does atomic radius generally decrease across a period from left to right?

• The number of electron energy levels increases.

• The effective nuclear charge increases, pulling electrons closer.

• The shielding effect increases significantly.

• Electrons are added to orbitals further from the nucleus.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2