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s2008m [1.1K]
1 year ago
13

Which of the following electron configurations represents an element that is MOST LIKELY to bond in a 1:1 ratio with calcium, Ca

?
1s 2 2s2 2p6 3s2 3p4

1s 2 2s2 2p6 3s2 3p5

1s 2 2s2 2p6 3s2 3p6

1s 2 2s2 2p6 3s2 3p2
Chemistry
1 answer:
fiasKO [112]1 year ago
7 0

There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. In ionic bonds, electrons are completely transferred. The correct option is option C.

<h3>What is chemical Compound?</h3>

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

During formation of a compound calcium act as cation as Ca²⁺ so, if any element has to react with this cation in a 1:1 ratio, must have -2 charge over it . Option C represents S⁻², which react with Ca²⁺.

Therefore, the correct option is option C.

To learn more about chemical compound, here:

brainly.com/question/26487468

#SPJ1

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¿Qué son los lantánidos y actínidos?
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Answer: En estos grupos de los elementos de transición se encuentran las llamadas tierras raras, separadas del resto de elementos de la tabla, que pertenecen al grupo IIIB y se les conoce como lantánidos y actínidos.

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2 years ago
How many moles of aluminum oxide al2o3 are in a sample with a mass of 204.0
erik [133]

Answer:

2 moles

Explanation:

Let us first start by calculating the molecular mass of Al₂O₃.

The mass of a mole of any compound is called it's molar mass. 1 molar mass 6.02 X 10²³, or Avogadro's number, of compound entities.

Say, 1 mole of Al₂O₃ has 6.02 X 10²³ of Al₂O₃ molecules/atoms. It also has 2*6.02 X 10²³ number of Al atoms and 3*6.02 X 10²³ number of O atoms.

Molecular mass of Al : 26.981539 u

Molecular mass of O: 15.999 u

Therefore, molecular mass of Al₂O₃ is:

= (2*26.981539) + (3*15.999) u

= 101.960078 u

This can be approximated to 102 u.

1mole weighs 102 u

So, 2moles will weigh 2*102 = 204 u

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