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Lesson: Atomic and Ionic Radii

Worksheet • 19 Questions

Q1:

Which element has the smallest atomic radius?

  • ABoron
  • BIndium
  • CAluminum
  • DGallium

Q2:

Rank the following ions in order of increasing radius: A s 3 , B r , K + , M g 2 + .

  • A M g < K < B r < A s 2 + + 3
  • B M g < B r < A s < K 2 + 3 +
  • C M g < K < A s < B r 2 + + 3
  • D B r < A s < K < M g 3 + 2 +
  • E A s < B r < K < M g 3 + 2 +

Q3:

Rank the following ions in order of increasing radius: N a + , L i + , C l , S 2 .

  • A L i < N a < C l < S + + 2
  • B S < C l < L i < N a 2 + +
  • C L i < N a < S < C l + + 2
  • D L i < C l < S < N a + 2 +
  • E C l < S < L i < N a 2 + +

Q4:

Rank the following atoms in order of increasing atomic radius: B a , G e , A s , C a .

  • A A s < G e < C a < B a
  • B B a < C a < A s < G e
  • C G e < A s < C a < B a
  • D B a < C a < G e < A s
  • E C a < B a < A s < G e

Q5:

Which of the following elements has the largest atomic radius?

  • A K
  • B S e
  • C B r
  • D S
  • E N a

Q6:

Which halogen would form a binary rubidium compound ( R b X ) with the longest bond length?

  • AIodine
  • BFluorine
  • CBromine
  • DChlorine

Q7:

Rank the following atoms in order of increasing atomic radius: M g , C s , R b , C a .

  • A M g < C a < R b < C s
  • B M g < R b < C a < C s
  • C C s < R b < C a < M g
  • D C a < M g < C s < R b
  • E R b < C s < M g < C a

Q8:

Rank the following ions in order of increasing radius: A s 3 , B r , K + , M g 2 + .

  • A M g 2 + < K + < B r < A s 3
  • B M g 2 + < B r < A s 3 < K +
  • C M g 2 + < K + < A s 3 < B r
  • D B r < A s 3 < K + < M g 2 +
  • E A s 3 < B r < K + < M g 2 +

Q9:

Which of the following elements has an atomic radius smaller than that of fluorine?

  • A N e
  • B A r
  • C O
  • D C l
  • E L i

Q10:

Which of the following elements has the smallest atomic radius?

  • A C l
  • B I
  • C M g
  • D S i
  • E S r

Q11:

Which Group 16 element has the largest atomic radius?

  • ATellurium
  • BOxygen
  • CSelenium
  • DSulfur

Q12:

In which of the following sequences are elements arranged in order of increasing atomic radius?

  • A K r < B r < G e < F l
  • B K r < F l < B r < G e
  • C G e < B r < K r < F l
  • D F l < G e < B r < K r
  • E F l < K r < B r < G e

Q13:

Rank the following atoms in order of increasing atomic radius: M g , C s , R b , C a .

  • A M g < C a < R b < C s
  • B M g < R b < C a < C s
  • C C s < R b < C a < M g
  • D C a < M g < C s < R b
  • E R b < C s < M g < C a

Q14:

Rank the following ions in order of increasing radius: N a + , L i + , C l , S 2 .

  • A L i + < N a + < C l < S 2
  • B S 2 < C l < L i + < N a +
  • C L i + < N a + < S 2 < C l
  • D L i + < C l < S 2 < N a +
  • E C l < S 2 < L i + < N a +

Q15:

Which of the following elements has the smallest atomic radius?

  • A C l
  • B I
  • C M g
  • D S i
  • E S r

Q16:

M g 2 + ions in the unit cell of a mineral can be exchanged for cations of a different element with no change in structure. The radius of the M g 2 + ion is 86 pm. Which of the following is the most likely identity of the substituted cation, assuming differences in charge can be neglected?

  • A L i + (radius 90 pm)
  • B A l 3 + (radius 68 pm)
  • C N a + (radius 116 pm)
  • D B e 2 + (radius 59 pm)
  • E C a 2 + (radius 114 pm)

Q17:

Which word or phrase is defined as the distance between two directly-bonded atoms in a molecule?

  • ABond length
  • BBond polarity
  • CCovalent bond
  • DAtomic radius
  • EVan der Waals radius

Q18:

Rank the following atoms in order of increasing atomic radius: B a , G e , A s , C a .

  • A A s < G e < C a < B a
  • B B a < C a < A s < G e
  • C G e < A s < C a < B a
  • D B a < C a < G e < A s
  • E C a < B a < A s < G e

Q19:

Which ion has the smallest radius?

  • A O 2
  • B S e 2
  • C S 2
  • D T e 2
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