Chem practice final 2

What is the correct noble gas shorthand electron configuration for a neutral atom of Calcium (Ca)?

• [Ne]3s2

• [Ar]4s2

• [Kr]5s2

• [Ar]3d2

Tags

NGSS.HS-PS1-1

An atom has the electron configuration 1s22s22p63s23p64s13d10. Which element is this?

• Potassium (K)

• Copper (Cu)

• Zinc (Zn)

• Nickel (Ni)

Tags

NGSS.HS-PS1-1

How many valence electrons does a neutral atom of Bromine (Br) have?

• 1

• 5

• 7

• 17

Tags

NGSS.HS-PS1-1

The Pauli Exclusion Principle states that:

• Electrons fill orbitals of the lowest energy first.

• Electrons occupy orbitals singly before pairing.

• No two electrons in an atom can have the same four quantum numbers (or an orbital can hold max 2 electrons with opposite spins).

• Only two electrons can occupy an s orbital.

What is the electron configuration of a K+ ion?

• 1s22s22p63s23p5

• 1s22s22p63s23p64s1

• 1s22s22p63s23p6

• 1s22s22p63s23p44s2

Tags

NGSS.HS-PS1-1

Which of the following subshells has the highest energy?

• 3p

• 4s

• 3d

• 4p

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements has the smallest atomic radius?

• Beryllium (Be)

• Magnesium (Mg)

• Calcium (Ca)

Which of these elements has the lowest first ionization energy?

• A) Lithium (Li)

• B) Sodium (Na)

• C) Potassium (K)

• D) Rubidium (Rb)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Arrange the following elements in order of increasing electronegativity: P, Na, Cl, Al.

• Na < Al < P < Cl

• Cl < P < Al < Na

• Na < P < Al < Cl

• P < Cl < Na < Al

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following ions is largest?

• Mg2+

• Na+

• F–

• O2–