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3 years ago

Which element has a greater electronegativity? fluorine (9) or radium (88)

Chemistry

2 answers:

emmainna [20.7K]3 years ago

7 0

Answer:

Fluorine

General Formulas and Concepts:

<u>Chemistry</u>

Reading a Periodic Table
Periodic Trends
Electronegativity - the tendency for an element to attract an electron to itself
Z-effective and Coulomb's Law, Forces of Attraction

Explanation:

The Periodic Trend for Electronegativity is up and to the right of the Periodic Table.

Fluorine is Element 9 and has 9 protons. Radium is Element 88 and has 88 protons. Therefore, Radium has a bigger Zeff than Flourine.

However, since Radium is in Period 7 while Fluorine is in Period 2, Radium has more core e⁻ than Fluorine does. This will create a much larger shielding effect, causing Radium's outermost e⁻ to have less FOA between them. Fluorine, since it has less core e⁻, the FOA between the nucleus and outershell e⁻ will be much stronger.

Therefore, Fluorine would attract an electron more than Radium, thus bringing us to the conclusion that Fluorine has a higher electronegativity.

Lapatulllka [165]3 years ago

6 0

Answer:

Fluorine

Explanation:

Electronegativity increases as you go from left to right across the periodic table and decreases as you go from top to bottom of the periodic table.

Fluorine is in period 3, group 17

Radium is in period 7, group 2

Radium is in period 7 and we know that electronegativity decreases as you move from top to bottom.

Explanation: As you move from top to bottom, you are in higher energy level, which means that your distance from the nucleus is further away.

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Quais são as funções que o sangue desempenha em nosso organismo

TiliK225 [7]

Answer:

Explanation:

Blood is an essential part of the circulatory system in the human body. The main function of blood is that it helps to transport materials to different parts of the body where they are need. Blood helps carry waste materials of metabolism from where they are produced to the excretory system. It helps carry oxygen round the body system and it takes out carbon dioxide that is not needed by the body.

Some part of the blood sees to fighting foreign bodies in the system. They are called whiteblood cells. There is no immune system without the white blood cells.

5 0

3 years ago

Calculate the frequency of the green light emitted by a hydrogen atom with a wavelength of 546 nm.

Alona [7]

Answer: The frequency of the green light emitted by a hydrogen atom with a wavelength of 546 nm is $5.49 \times 10^{14} s^{-1}$ .

Explanation:

Given: Wavelength = 546 nm $(1 nm = 10^{-9} m)$ = $546 \times 10^{-9} m$

The relation between frequency and wavelength is as follows.

$\nu = \frac{c}{\lambda}$

where,

$\nu$ = frequency

c = speed of light = $3.0 \times 10^{8} m/s$

$\lambda$ = wavelength

Substitute the values into above formula as follows.

$\nu = \frac{c}{\lambda}\\= \frac{3.0 \times 10^{8} m/s}{546 \times 10^{-9} m}\\= 5.49 \times 10^{14} s^{-1}$

Thus, we can conclude that the frequency of the green light emitted by a hydrogen atom with a wavelength of 546 nm is $5.49 \times 10^{14} s^{-1}$ .

4 0

3 years ago

What is the molar mass of water (H2O)?

Sidana [21]

Answer:

The molar mass is: 18.02 g/mol.

Explanation:

Mass of two moles of Hydrogen atoms (H2) = 2x 1 g/mol = 2 g/mol.

Mass of one mole of water (H2O) = 2 g/mol + 16 g/mol = 18 g/mol.

1 mole of Hydrogen= 1.01, so if we have 2 moles of it here, that would be 2.02.

1 mole of Oxygen (that's all we have here)= 16.00

Once you add the two together (2.02+16.00), you will get 18.02.

I hope this made sense! Have a great day!

3 0

3 years ago

2. Which of the changes indicated are oxidations

sergeinik [125]

Answer:

A) Oxidized

B) Reduced

C) Oxidized

D) Oxidized

Explanation:

A) Cu becomes Cu²⁺

oxidation state increased from 0 to +2. It gets oxidize.

B) Sn⁺⁴ becomes Sn²⁺

oxidation state decreased from +4 to +2. It gets reduced.

C) Cr³⁺ becomes Cr⁺⁶

oxidation state increased from +3 to +6. It gets oxidize.

D) Ag becomes Ag⁺

oxidation state increased from 0 to +1. It gets oxidize.

Oxidation:

Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

Reduction:

Reduction involve the gain of electron and oxidation number is decreased.

<em>Consider the following reactions. </em>

4KI + 2CuCl₂ → 2CuI + I₂ + 4KCl

the oxidation state of copper is changed from +2 to +1 so copper get reduced.

CO + H₂O → CO₂ + H₂

the oxidation state of carbon is +2 on reactant side and on product side it becomes +4 so carbon get oxidized.

5 0

4 years ago

A nuclide of phosphorus 3015P decays into a nuclide of silicon 3014Si. In order to satisfy charge conservation and lepton number

jeka94

In order to satisfy charge conservation and lepton number conservation the other products must be neutron.

<h3>What is conservation of mass?</h3>

The principle of conservation of mass states that, the sum of the initial mass of reactants must be equal to final mass of the products.

$_{15}^{30}P\ --- > \ _{14}^{30} Si \ + \ ^{0}_{1} n$

The balanced reaction of radioactive decay of phosphorous shows conservation of mass.

Thus, in order to satisfy charge conservation and lepton number conservation the other products must be neutron.

Learn more about radioactive decay here: brainly.com/question/1383030

#SPJ1

3 0

2 years ago