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3 years ago

How do anion formation and valence electrons relate?

Chemistry

1 answer:

sveta [45]3 years ago

5 0

Answer 1: Atoms gain valence electrons to form anions.

Explanation:

Anions are negatively charged species of an ions. Anions are formed when atoms with nearly complete octet gains electrons.

Answer 2: Emission spectrum

Explanation:

When ever electron jumps from higher energy to lower energy level energy is emitted out in the form of light.The wavelength of the light is given as $\lambda$ :

$\lambda=\frac{hc}{E}$ , E = energy, c= speed the light, h= planck constant

Answer 3: Two atoms of silicons could combine by fusion in order to create nickel.

Explanation:

Silicon has atomic number of 14 with atomic mass of 28 u.

nickel has atomic number of 28 with atomic mass of 59 u.

Two different isotopes of silicon atom will fuse together to give nickel.

$^{29}Si_{14}+^{30}Si_{14}\rightarrow^{59}Ni_{28}$

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bagirrra123 [75]

Add up all the grams to get 9.96, then divide the amount if each element by the total;
4.56 of Pb divided by 9.96 = 0.4578313 now multiply by 100 and get 45.8% of Pb, then do the same for the rest of the elements, hope this helped <3

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3 years ago

In an electron dot diagram, two pairs of shared electrons represents a?

Talja [164]

Hi! The answer is double bond.

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4 years ago

Briefly describe the procedures to prepare a burette and pipette for titration

adelina 88 [10]

The burette or pipette is first rinsed with water and secondly with the solution that it will contain.

The burette and pipette are laboratory apparatus that are used to hold liquids especially during titration. The pipette mostly serves the purpose of transferring liquids from one container to another. The burette is used to run solutions into the flask.

To prepare both burette and pipette for titration, they are first rinsed with water and secondly with the solution that they are to contain. This helps to prevent contamination.

Learn more: brainly.com/question/5624100

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3 years ago

A reaction in which a substance reacts with oxygen, emitting heat and forming oxygen-containing compounds is an example of a(n):

yaroslaw [1]

Answer: B) combustion reaction.

Explanation:

A) acid-base reaction: When an acid reacts with a base, to form metal salt and water, this type of reaction is Acid Base reaction.

Example: $HCl+NaOH\rightarrow NaCl+H_2O$

B) combustion reaction: When a hydrocarbon reacts with oxygen to produce carbon dioxide and water, this type of reaction is combustion reaction.

$CH_4+2O_2\rightarrow CO_2+2H_2O$

C) precipitation reaction: a reaction in which aqueous solution of two compounds on mixing react to form an insoluble compound which separate out as a solid are called precipitation reactions.

$Na_2SO_4(aq)+BaCl_2(aq)\rightarrow BaSO_4(s)+NaCl(aq)$

D) gas evolution reaction: a reaction in which one of the product is formed as a gas.

$CaCO_3(s)\rightarrow CaO(s)+CO_2(g)$

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4 years ago

Saturated fats are typically liquid at room temperature. saturated fats are typically liquid at room temperature.

dmitriy555 [2]

False, saturated fats like butter or coconut oil are typically solid at room temperature.

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3 years ago