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skelet666 [1.2K]
3 years ago
9

Fact check this please

Chemistry
2 answers:
kicyunya [14]3 years ago
8 0

Answer:

nhbknjkb hbffvjkernjvelfbbjvjc

Explanation:

olga_2 [115]3 years ago
4 0
.......the answer is B
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calcium has atomic number of 20 how many electrons of a calcium atom are involved in chemical bonding
Lelu [443]

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.

 


7 0
3 years ago
Read 2 more answers
HELP PLEASE 100 points!!!
djyliett [7]

Answer:

by the looks of it the answer you have is correct

Explanation:

3 0
2 years ago
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Do anyone know the answer?
siniylev [52]

Answer:

C2H4 + 3O2 --> 2CO2 + 2H2O

Explanation:

For an equation to be balanced, it must have an equal number of atoms on each side. C2H4 + 3O2 --> 2CO2 + 2H2O is the only equation out of these four the fulfills this requirement.

5 0
3 years ago
Why was it important to polish the copper strips and wire, the coin, and the nail in the electroplating experiment?
Ierofanga [76]

Answer:

You need to have a clean surface for contact between the solution and the material.

Explanation:

The presence of impurity on the surface of the material, and lack of surface uniformity (smoothness) can reduce the effective contact between material and solution and can interfere with the electroplating process's success.

7 0
3 years ago
Which of these is a covalent compound? Question 5 options: NO2 LiCl AlCl3 Na2S
gulaghasi [49]
The correct answer is NO2. The 2 oxygen atoms and 1 Nitrogen atoms form a covalent bond.
7 0
3 years ago
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