10. Periodic Properties of the Elements
Periodic Trend: Atomic Radius
10. Periodic Properties of the Elements
Periodic Trend: Atomic Radius - Video Tutorials & Practice Problems
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The atomic radius of an element is the distance from its nucleus to its outer electron shell.
Atomic Radius
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concept
Periodic Trend: Atomic Radius
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concept
Periodic Trend: Atomic Radius
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Moving towards the top right corner of the Periodic Table causes the atomic radii to decrease.
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example
Periodic Trend: Atomic Radius Example 1
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Problem
ProblemArrange the following atoms in order of decreasing atomic radius:Sr, Se, Ne, Zn
A
Sr > Zn > Se > Ne
B
Zn > Sr > Se > Ne
C
Ne > Sr > Zn > Se
D
Zn > Se > Sr > Ne
E
Se > Sr > Zn > Ne
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Problem
ProblemWhich alkaline earth metal has the smallest atomic radius?
A
Ca
B
Rb
C
Na
D
Ra
E
Fr
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Problem
ProblemIn moving from top to bottom in the same column on the periodic table, what trend is expected for atomic size?
A
Increase because the nucleus is getting stronger.
B
Increase because electrons are being placed in higher n-values.
C
Decrease because the nucleus is getting stronger.
D
Increase because electrons are being added to degenerate orbitals.
E
Decrease because electrons are being placed in higher n-values.
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PRACTICE PROBLEMS AND ACTIVITIES (45)
- What trend in size of the atom do you see as you move down a group?
- A portion of a two-dimensional 'slab' of NaCl(s) is shown here (see Figure 8.2) in which the ions are numbere...
- Which element has the largest atomic radius? (LO 5.20) (a) Rb (b) Co (c) Mg d) As
- Which quantity must be determined experimentally in order to determine the bonding atomic radius of an atom? (...
- With the exception of helium, the noble gases condense to form solids when they are cooled sufficiently. At t...
- Tungsten has the highest melting point of any metal in the periodic table: 3422 °C. The distance between W ato...
- Which of the following statements about the bonding atomic radii in Figure 7.7 is incorrect? (i) For a given p...
- The experimental Pb¬Cl bond length in lead(II)chloride, PbCl2, is 244 pm. Based on this value and data in Fig...
- Using only the periodic table, arrange each set of atoms in order from largest to smallest: (c) C, Cl, Cu.
- Using only the periodic table, arrange each set of atoms in order of increasing radius: (b) S, Si, Sr
- Which of the following three spheres represents a Ca atom, which an Sr atom, and which a Br atom?
- Consider S, Cl, and K and their most common ions. (a) List the atoms in order of increasing size.
- Choose the larger atom in each pair. a. Al or In b. Si or N c. P or Pb d. Si or Cl
- Choose the larger atom in each pair. a. Sn or Si b. Br or Ga c. Sn or Bi d. Se or Sn
- In Table 7.8, the bonding atomic radius of neon is listed as 58 pm, whereas that for xenon is listed as 140 pm...
- The following observations are made about two hypothetical elements A and B: The A¬A and B¬B bond lengths in t...
- Note from the following table that there is a significant increase in atomic radius upon moving from Y to La, ...
- Which of the following pairs of elements would you expect to have the most similar atomic radii? a. Si and Ga...
- The elements with atomic numbers 35 and 53 have similar chemical properties. Based on their electronic config...
- Consider the elements: Na, Mg, Al, Si, P. b. Which element has the smallest atomic radius?
- Why do atomic radii decrease from left to right across a period of the periodic table?
- Order the following atoms according to increasing atomic radius: S, F, O.
- Order the following atoms according to increasing atomic radius: Rb, Cl, As, K.
- Which atom in each of the following pairs has a larger radius? (a) Na or K (b) V or Ta (c) V or Zn (d) Li or B...
- Which atom in each of the following pairs has a larger radius? (a) C or Ge (b) Ni or Pt (c) Sn or I (d) Na or ...
- Which element, oxygen (O) or fluorine (F), has a smaller atomic radius?
- The experimental Bi−I bond length in bismuth triiodide, BiI3, is 2.81 Å. Based on this value and data in the f...
- Atomic radius generally increases as we move
- Which of the following correctly lists the five atoms in order of increasing size (smallest to largest)?
- Which one of the following atoms has the largest radius?
- The atomic radius of main-group elements generally increases down a group because
- Rank the following elements in order of decreasing atomic radius. rank from largest to smallest radius. to ran...
- Which of the following correctly lists the five atoms in order of increasing size
- The atomic radius of an element ____________ when you move from the top to the bottom of a family.
- The trend towards smaller atomic radii as one moves to the right in a period is _____.
- Atomic radius generally increases as we move ________.
- Which statement best describes the trend in atomic radii observed in the periodic table?
- What trend in size of the atom do you see as you move down a group?
- How do you think the size of an atom will affect its ability to attract additional electrons
- As you move across the periodic table atoms tend to get smaller because, ______________.
- As you travel down a group atomic radius (decreases/increases). Why
- Which of these describes atomic radii as one moves from top to bottom within a group
- Which of these describes a tendency for atomic radii as displayed on the periodic chart?
- Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si, and Ar?
- What trend in atomic radius occurs across the periodic table? what causes this trend?