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podryga [215]
2 years ago
12

Please help I don’t know this question )): thank you !!(:p

Chemistry
1 answer:
alekssr [168]2 years ago
8 0

\fbox{ \sf Correct \:  answer \:  is  \: +1}

The given data states that the 2-D diagram is representing Lithium molecule.

few things one must know before solving the question,

Lithium is a Alkali metal having 3 electrons, out of which two electrons lies in 1S orbital (K shell) & one electron lies in 2S orbital. To attain the stability ( nobel configuration) lithium requires 7 electron which is not possible at ordinary condition & it requires a huge amount of energy instead lithium loses one electron from outermost shell.

We know that when any atom loses a electron the oxidation number is written with plus(+) symbol.

Hence net charge on lithium ion is +1

\small \sf Thanks  \: for  \: joining \:  brainly \:  community! \:

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Answer:

C. The first ionization energy decreases because the outermost

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Explanation:

Ionization energy trend along group:

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.

As the size of atom increases the ionization energy from top to bottom also  decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.

Ionization energy trend 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. 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.

6 0
3 years ago
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Complete combustion of 2.60 g of a hydrocarbon produced 8.46 g of co2 and 2.60 g of h2o. what is the empirical formula for the h
zubka84 [21]
1 mole of carbon dioxide contains a mass of 44 g, out of which 12 g are carbon. 
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Therefore, 2.6 g of water contains;
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We first calculate the number of moles of each,
Carbon = 2.3073/12  = 0.1923 moles
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Then, we calculate the ratio of Carbon to hydrogen by dividing with the smallest number value;
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  0.1923/0.1923 : 0.2889/0.1923
                       1 :  1.5
                      (1 : 1.5) 2
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3 years ago
What three factors affect the biodiversity of an ecosystem
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The answer is
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