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frez [133]
3 years ago
12

What is the formula of a compound formed between iodine (I) and calcium (Ca)?

Chemistry
2 answers:
bixtya [17]3 years ago
8 0

<u>Answer:</u> The chemical formula for the compound will be CaI_2

<u>Explanation:</u>

Calcium is the 20th element of the periodic table having electronic configuration of [Ar]4s^2

This element will loose 2 electrons and thus shows an oxidation state of +2 units.

Iodine is the 53rd element of the periodic table having electronic configuration of [Kr]5s^24d^{10}5p^5

This element requires 1 electron and thus shows an oxidation state of -1 units.

So, by criss-cross method, the oxidation state of the ions will get exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

Hence, the chemical formula for the compound formed will be CaI_2

Nadya [2.5K]3 years ago
7 0
Calcium iodide (chemical formula <span>CaI2</span>)
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Given what we know, we can confirm that in a voltaic cell, the anode loses electrons and is oxidized, meanwhile, the cathode is reduced by gaining electrons.

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3 0
2 years ago
Suggest one reason why cans are not made entirely from tin
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5 0
3 years ago
Wht are the trends for electronegativity and ionzation energy similar​
FinnZ [79.3K]

Answer:

Along period electronegativity and ionization energy increases.

Along group electronegativity and ionization energy decreases.

Explanation:

Along period:

As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. Thus the attraction of the atoms for valance electrons increases. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required, and electronegativity also increases.

Along group:

As we move from top to bottom in periodic table the atomic sizes increases.The electrons are added in next energy level in every next element. Thus the valance electrons farther away from the nucleus and hold of nucleus becomes weaker,  because of weak nuclear attraction atomic radii increases and electronegativity and ionization energy decreases.

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2 years ago
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I can't understand your option because there is no full stop however

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4 0
3 years ago
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