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
statuscvo [17]
3 years ago
8

Calcium has an atomic number of 20. How many electrons of a calcium atom are involved in chemical bonding?

Chemistry
1 answer:
NARA [144]3 years ago
3 0

The answer is 2 electrons.


The electron configuration of calcium is 2:8:8:2

Calcium has two electrons in its outermost shell. These are its valence electrons and are the ones used in bonding with other elements.  Valence electrons of an atom are those electrons that are in its outer energy shell or that are available for bonding.

Calcium is a metal. When metals react with non-metals, electrons are transferred from the metal atoms to the non-metal atoms forming ions. The resulting compound is known  as an ionic compound.

For example, when calcium metal reacts with chlorine gas,   calcium gives up its two valence electrons and Chlorine accepts them resulting in a new substance called calcium chloride in which the two elements have ended up forming ionic bonds.

You might be interested in
What is the balance equation for <br> _AI+_Pb(NO3)2—__Pb+__Ca(NO3)2
Firdavs [7]

Answer:

2 Al + 3 Pb(NO3)2 > 2 Al(NO3)3 + 3 Pb

Explanation:

4 0
3 years ago
Help with the 3rd question plslsls I’ll brainlist.
Brilliant_brown [7]

1 - energy 2- heat 3 -plant

4 0
2 years ago
A testable question is one that _____.
cestrela7 [59]

Answer:

One that “Can be answered by conducting an experiment”

Explanation:

8 0
3 years ago
Read 2 more answers
Calculate the average atomic mass of element X using the table below. Then use the periodic table to identify the element. Separ
Ksenya-84 [330]

Answer:

126.8, Iodine

Explanation:

  • mass ×abundance/100
  • (126.9045×80.45/100)+(126.0015×17.23/100)+(128.2230×2.23/100)
  • 102.1+21.7+3=126.8

<em>IODINE</em><em> </em><em>has</em><em> </em><em>an</em><em> </em><em>atomic</em><em> </em><em>mass</em><em> </em><em>of</em><em> </em>126.8 or 126.9

4 0
3 years ago
What is the molarity of a solution that contains 0.202 mol KCl in 7.98 L solution?
mr Goodwill [35]

Explanation:

molarity = no. of moles of solute/solution in litres

molarity =0.202/7.98

=0.025 M

8 0
3 years ago
Other questions:
  • A tetrahedral molecule has ___ regions of high electron density around the central atom. these molecules have central atoms with
    7·2 answers
  • What part of fungi resembles the roots of plants?
    6·1 answer
  • During a flame test, a lithium salt produces a characteristic red flame. This red color is produced when electrons in excited li
    8·1 answer
  • True or false certain cations are associated with either exotermic or endothermic processes
    7·1 answer
  • A molecule with the formula ax4e uses _________ to form its bonds.
    15·1 answer
  • The radius of a circle is 7.31. How should the circle area be reported?
    7·1 answer
  • What does the atomic number represent?
    13·1 answer
  • How many carbon atoms are present in a mole of 12c??
    5·1 answer
  • True or false, the four units that must always be used when using the ideal gas law are liters, atm, Kelvin, and grams
    13·1 answer
  • A common oxidizing agent is..?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!