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
Nuetrik [128]
3 years ago
10

List four common ions with a valence electron configuration of [Kr]. List the ions in the order of increasing atomic number. Hin

t: two anions and two cations.
Chemistry
1 answer:
chubhunter [2.5K]3 years ago
6 0
<h2> Se^{-2}, Br^{-}, Rb^{+}, Sr^{+2}.</h2>

Explanation:

  • Atomic number of krypton [Kr] =36
  • Electronic configuration of krypton [Kr] = [Ar]3d^{10} 4p^{6}, 2s^{2}
  • Common ions with valence electronic configuration of [Kr] are bromine ion, strontium ion, selenite ion and rubidium ion.
  • The Atomic number of the following ions in increasing order are;

       Se < Br < Rb < Sr

       Se (Z) = 34

       Br (Z) = 35

       Rb (Z) = 37

       Sr (Z) = 38

  • Electronic configuration of the following elements are:

         Se (Z) = [Ar](3d^{10}, 4s^{2}, 5p^{4})

         Br (Z) = [Ar](3d^{10}, 4s^{2}, 5p^{5})

         Rb (Z) = [Kr](5s^{1})

         Sr (Z) = [Kr](5s^{2})

Therefore, the respective ions formed according to theabove electronic configuration are Se^{-2}, Br^{-}, Rb^{+}, Sr^{+2}

Hence the two anions areSe^{-2}, Br{-}

and, the two cations areRb^{+}, Sr{+2}

You might be interested in
Item 3
svetoff [14.1K]

Answer:

Semiconductors are poor conductors at low temperatures, but their resistance decreases with increasing temperature.

Explanation:

A semiconductor can be defined as a crystalline solid substance that has its conductivity lying between that of a metal and an insulator, due to the effects of temperature or an addition of an impurity. Semiconductors are classified into two main categories;

1. Extrinsic semiconductor.

2. Intrinsic semiconductor.

The statement which best describes the electrical conductivity of metals and semiconductors is that semiconductors are poor conductors at low temperatures, but their resistance decreases with increasing temperature.

This ultimately implies that, semiconductors are typically an insulator (poor conductor) at low temperatures and a good conductor at high temperatures.

Additionally, conduction involves the transfer of electric charge or thermal energy due to the movement of particles. When the conduction relates to electric charge, it is known as electrical conduction while when it relates to thermal energy, it is known as heat conduction.

6 0
2 years ago
In the following compound (HCl) How many electrons are gained and lost by each atom?
Verizon [17]

Explanation:

In HCL, one positive atom is given to chlorine from hydrogen so that it can complete it's octate. chlorine take one electron from hydrogen.

In NaCl, Sodium takes one electron from chlorine to complete its orbit with eight electrons. Chlorine gives one electron to sodium.

8 0
3 years ago
Trojans are _____.
liubo4ka [24]

Answer:

d. asteroids affected by Jupiter's gravity

Explanation:

A Trojan horse or Trojan is a type of malware that is often disguised as legitimate software. Trojans can be employed by cyber-thieves and hackers trying to gain access to users' systems. Users are typically tricked by some form of social engineering into loading and executing Trojans on their systems.

8 0
2 years ago
Read 2 more answers
The orderly geometric arrangement of atoms is called a crystalline solid. <br> a. True<br> b. False
Crank
a.True.

The ordely geometric arrangement of atmos is called a crystalline solid.
4 0
3 years ago
Read 2 more answers
How many moles are there in 67.2 grams of h2
yarga [219]

Answer: 33.3 moles

Explanation: 67.2 g H2 = 67.2/2.016 = 33.3 moles

7 0
3 years ago
Other questions:
  • Why is benzyl alcohol more soluble in ether than water?
    6·1 answer
  • Both a globe and a flat world map can module features of the earth. Give an example of when you would use each of these modules.
    5·1 answer
  • In general what is the effect of increased temperature e on solubility of a gas
    5·2 answers
  • Which of the following is the best example of chemical weathering?
    13·1 answer
  • If someone who is good at this can help me
    5·1 answer
  • Cu + AgNO3 = Cu(NO3)2 +Ag
    5·1 answer
  • What is the predominant intermolecular force in the liquid state of each of these compounds: hydrogen fluoride (HF), carbon tetr
    7·1 answer
  • If you place 2 moles of NaCL in a beaker and then add enough water to have a final volume of 0.5 liters, what is the molarity of
    5·1 answer
  • How do systems impact creation?
    5·1 answer
  • En un atomo polielectronico el sbnivel difuso esta constituido de 5 orbitas degenerdos?
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!