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
dybincka [34]
3 years ago
15

Which of these is an isoelectronic series? 1) na+, k+, rb+, cs+ 2) k+, ca2+, or, s2– 3) na+, mg2+, s2–, cl– 4) li, be, b, c 5) n

one of these (a-d) save?
Chemistry
1 answer:
ss7ja [257]3 years ago
7 0
An isoelectronic series is where all of the ions listed have the same number of electrons in their atoms. When an atom has net charge of zero or neutral, it has equal number of protons and electrons. Hence, it means that the atomic number = no. of protons = no. of electrons. If these atoms become ions, they gain a net charge of + or -. Positive ions are cations. This means that they readily GIVE UP electrons, whereas negative ions (anions) readily ACCEPT electrons. So, to know which of these are isoelectronic, let's establish first the number of electron in a neutral atom from the periodic table:

Na=11; K=19; Rb=37; Cs = 55; Ca=20; S=16; Mg=12; Li=3; Be=4; B=5; C=6

A. Na⁺: 11-1 = 10 electrons
     K⁺: 19 - 1 = 18 electrons
     Rb⁺: 37-1 = 36 electrons

B. K⁺: 19 - 1 = 18 electrons
    Ca²⁺: 20 - 2 = 18 electrons
    S²⁻:  16 +2 = 18 electrons

C. Na⁺: 11-1 = 10 electrons
    Mg²⁺: 12 - 2 = 10 electrons
     S²⁻:  16 +2 = 18 electrons

D. Li=3 electrons
    Be=4 electrons
    B=5 electrons
    C=6 electrons

The answer is letter B.
You might be interested in
What is the mass % of iron in Fe(CH3CO2)2<br><br> (Fe=iron=55.85)
Serjik [45]
The mass percentage is 15.1465%.
5 0
3 years ago
PLS HELP ASAP
LenaWriter [7]

Answer:

B) burning wood

Explanation:

6 0
3 years ago
Read 2 more answers
Evaporación del alcohol cambio físico o químico?
Vlada [557]
Physical because you can see it evaporate have a great día
7 0
3 years ago
Which produces the most energy? A. passing 5 kg of water through a hydroelectric power plant. B. fissioning 5 kg of uranium. C.
blagie [28]

Answer:

D. fusing 5 kg of hydrogen.

Explanation:

8 0
3 years ago
How much does the air weigh within a column that is 1 square inch in area that extends from sea level all the way to the top of
fredd [130]

Answer:

14.7 lbs

Explanation:

Air pressure is the weight of the air above us. It is approximately 14.7 pounds or lbs per square inch at sea level. It means that an air column weights 14.7 lbs, 1 square inch in diameter, reaching all the way up to the top of the atmosphere.

5 0
3 years ago
Other questions:
  • What would happen to the pressure if the volume were reduced to 0.5 l and the temperature increased to 260 ∘c?
    12·1 answer
  • 0.76 g of lead(2) nitrate was dissolvedin 50.00ml of water a d treated with 25.00 ml of 0.2010M sodium sulfate inoder to determi
    5·1 answer
  • After our solar system began to form, dust and gas combined into small bodies that formed the planets. What are these small bodi
    5·2 answers
  • several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear is white. What pr
    10·2 answers
  • Explain why you hear a “whoosh” sound when you open a can containing a carbonated drink. Which gas law applies?
    8·2 answers
  • Please match the example with the classification of matter in which it belongs. Column A 1. soil: soil 2. chocolate milk: chocol
    12·1 answer
  • What type of matter is in this
    8·2 answers
  • Study the topographic map.
    10·2 answers
  • What is the frequency of a photon with an energy of 3.26 x 10-19 J?
    15·1 answer
  • Calculate the percentage error in the molar mass of our natural gas which is 16.9g/mol
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!