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natali 33 [55]
3 years ago
8

Rank the following elements by electron affinity 1) fluorine 2) selenium 3) arsenic 4) potassum 5) argon

Chemistry
1 answer:
denis23 [38]3 years ago
7 0

Answer:

Fluorine > Selenium > Arsenic > Potassium > Argon

Explanation:

Electron affinity describes the ability or readiness or tendency of an atom to gain an electron.

The higher the value, the higher the tendency. Electron affinity depends on the on the nuclear charge and atomic radius. When nuclear charge is more, electron affinity is high, when atomic radius increases electron affinity reduces.

Noble gases such as Helium, Neon, and Argon would have 0 affinity for electrons because of their stable electronic configuration. From the list, Ar is the least in terms of electron affinity.

Potassium is a metal with large electropositivity which describes the tendency of an atom to lose electrons. Potassium would readily lose electrons instead of gaining.

Between Arsenic and Selenium: Arsenic belongs to group V and Selenium group VI. The two elements both belong to period IV on the periodic table. Across a period, electron affinity increases due to increase in nuclear charge. Therefore, Selenium would have a greater electron affinity compared to Arsenic.

Fluorine has the highest electron affinity of all. It needs just an electron to complete its octet.

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On the fahrenheit scale, at what temperature does water boil? a. 451°f b. 264°f c. 212°f d. 100°f
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The temperature that water boils on the fahrenheit scale is c. 212°f.

<h3>What is Temperature conversation?</h3>

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Therefore, on fahrenheit scale water boils at  212°f which is equivalent to 100°C on the Celcius scale.

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5 0
1 year ago
Below is a list of terms used in characterizing solutions. Match the words.
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Answer:

1) molality

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4) d. solute

5) a. molarity

Hope this helps.

7 0
3 years ago
Please help
ryzh [129]

1. A double replacement chemical equation is a reaction in which the cations and anions of the compounds that react exchange their positions forming new compounds. Double replacement reaction usually leads to the formation of water, a precipitate or a gas as one of the products.

Example of a double replacement reaction:

CaCl_{2}(aq)+Na_{2}SO_{4}(aq)-->CaSO_{4}(s)+2NaCl(aq)

2. The above equation obeys the Law of conservation of mass as the number of atoms of each element on the reactant side is equal to that of the product side. So the overall mass on reactant side will be equal to that on the product side.

CaCl_{2}(aq)+Na_{2}SO_{4}(aq)-->CaSO_{4}(s)+2NaCl(aq)

Mass of each reactant per mole:

(1 * Ca + 2 * Cl)=(1*40.08g/mol) + (2*35.45g/mol)=110.98g/mol

(2*Na)+(1*S)+(4*O)=(2*22.99g/mol)+(1*32.07g/mol)+(4*16.00g/mol)=142.04g/mol

Total mass on reactant side = (110.98+142.04) g/mol= 253.02g/mol

Mass of each product per mole:

(1*Ca)+(1*S)+(4*O)=(1*40.08g/mol)+(1*32.06g/mol)+(4*16.00g/mol)=136.14g/mol

(2*Na)+(2*Cl)=(2*22.99g/mol)+(2*35.45g/mol)=116.88g/mol

Total mass on product side = (136.14+116.88)g/mol=253.02g/mol

Total mass on reactant side = Total mass on product side =253.02g/mol

So, it obeys the law of conservation of mass as the total mass remains same before and after the reaction.

3. In a chemical reaction, mass is conserved that means the mass of reacting species is equal to the mass of the products formed. Similarly the total number of atoms of each element is also conserved in a chemical reaction.

6 0
2 years ago
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