Grade 11 IB Chemistry Review

The electron configuration of an atom is 1s²2s²2p⁶.  The number of electrons in the atom is 

• 3
• 6
• 8
• 10

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the noble gas shorthand electron for Sulfur atom?

• [Ar] 3p⁴
• [He] 3s²3p⁴
• [Ne] 3s²3p⁴
• [Na] 3s²3p⁴
  

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the highest occupied energy level?

• 1
• 2
• 3
• 4

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

As the energy level increases the difference in the energy level ...

• increases
• decreases
• stays the same
• none of these

Tags

NGSS.HS-PS1-2

The arrows pointing down represents...

• photon absorption
• proton emission
• electron absorption
• electron transition

A reaction occurring in the extraction of lead from its ore can be represented by this unbalanced equation:

__ PbS + __O2 --> __ PbO + __ SO2

When the equation is balanced using the smallest possible whole numbers, what is the coefficient for O2?

• 1

• 2

• 3

• 4

What is the trend for atomic radius moving down the periodic table?

• increase

• decrease

What is the reason for why electronegativity increases across a period on the periodic table?

• the inner electron shielding increases

• the inner electron shielding decreases

• the effective nuclear charge increases

• the effective nuclear charge decreases

Why does ionization decrease from Be to B instead of increase like the rest of the period trend?

• a 2p sublevel is added on B

• electron-electron repulsion is taking place in the 2p sublevel

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Why does the ionization energy decrease between N and O instead of increase?

• a 2p sublevel is added on O

• electron-electron repulsion is taking place in the 2p sublevel of O

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2