1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
swat32
3 years ago
10

An exception to this trend occurs in Group 13, and gallium is smaller than aluminum. Justify this exception to the expected peri

odic trend by invoking the electron configurations of each element.
Chemistry
1 answer:
kumpel [21]3 years ago
7 0

Answer:

Reduction in effective nuclear charge due to the filling of 3d sub-shell

Explanation:

Although, according to the trend in the periodic table, the size of shell go on increasing but an anomaly in Group 13 s observed in case of Aluminium and Gallium. Gallium should have a bigger shell configuration according to the trend but it is small as compared due to the first filling of 3d sub-shell by electron as we can see from their electronic configurations as:

Aluminium = [Ne] 3s² 3p¹

Gallium = [Ar] 3d10 4s2 4p1

You might be interested in
In the presence of CN-, Fe3 forms the complex ion Fe(CN)63-. The equilibrium concentrations of Fe3 and Fe(CN)63- are 8.5 x 10-40
aleksklad [387]

Answer:

Kf = 9.96x10⁴¹

Explanation:

When Fe³⁺ and CN⁻ are in water, complex Fe(CN)₆³⁻ is formed, thus:

Fe³⁺ + 6CN⁻ ⇄ Fe(CN)₆³⁻

Kf is defined as:

Kf = [Fe(CN)₆³⁻] / [Fe³⁺] [CN⁻]⁶

Equilibrium concentration of ions is:

[Fe(CN)₆³⁻] = 1.5x10⁻³M

[Fe³⁺] = 8.5x10⁻⁴⁰

[CN⁻] = [KCN] = 0.11M

Replacing in Kf expression:

Kf = [1.5x10⁻³M] / [8.5x10⁻⁴⁰] [ 0.11M]⁶

<h3>Kf = 9.96x10⁴¹</h3>

5 0
3 years ago
How many titanium atoms does it contain? titanium has a density of 4.50g/cm3, a pure titanium cube has an edge length of 2.82 in
yKpoI14uk [10]
2.82 inches is are equivalent to 7.16 cm.
The volume of the cube ;
 7.16 × 7.16 ×  7.16 = 367.06 cm³
The density of titanium is 4.5 g/cm³
Therefore; mass will be 4.5 × 367.06 = 1651.77 g
1 mole of titanium has 47.867 g
thus, 1651.77 g is equivalent to  1651.77/ 47.867 = 34.507 moles
According to the Avagadro's constant 1 mole = 6.022 × 10∧23 atoms 
 Therefore, we get 6.022 × 10∧23 × 34.507 = 2.078 ×10∧25 atoms
5 0
3 years ago
Read 2 more answers
Help anyone can help me do this question,I will mark brainlest.​
Anettt [7]

Answer:

12 grams

Explanation:

if  you used the transformation equation  you would end up with 12 grams

4 0
3 years ago
Name gaseous element in period 2 group 16?
Sholpan [36]

Answer:

mark me as a brainlist answer

Explanation:

Oxygen

3 0
2 years ago
Most seeds germinate and start to grow in the dark. Why don’t they need light right away?
White raven [17]

Answer:

HD video is the best way too much for a TV now

8 0
3 years ago
Other questions:
  • What observations would lead you to believe that the ink is actually a mixture?
    6·1 answer
  • How many milliliters of 0.100 m naoh are needed to completely neutralize 25.0 ml of 0.250 m h3po4 ?
    14·1 answer
  • How can we explain patterns of behavior among chemical elements?
    15·2 answers
  • Which statement best describes the substance the result when electrons are transferred from a metal to a nonmetal
    14·1 answer
  • What is the wavelength of light that has an energy of 8.0 x 109J​
    12·1 answer
  • An electromagnetic wave has a wavelength of 0.12 meters. what is that in nanometers?
    13·1 answer
  • What evidence is there that electrons move around in definite pathways around the
    11·1 answer
  • Engineers find a new metal that is stronger than steel.. (so on)
    10·1 answer
  • Why might the ability to produce three-dimensional images of organs be helpful in diagnosing a patient's ailment?
    14·1 answer
  • 50 Two chemicals are mixed and sold in a plastic bag The bag begins to inflate and becomes hot to the touch. what evidence suppo
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!