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3 years ago

How can one determine if a bond between two atoms is ionic covalent or metallic?

Chemistry

1 answer:

Wewaii [24]3 years ago

5 0

Answer:

By the Pauling rule, of EN

Explanation:

EN means electronegativity, the ability of atoms to attract electrons.

In the periodic table each atom, has a value of EN.

When there are two atoms bonded, you must substract the EN (the high - the low) → ΔEN

It depends on the ΔEN, that you can define a bond as ionic, covalent or metallic.

Ionic ΔEN → > 1.7

Covalent polar 0.4 < ΔEN > 1.7

Covalent non polar 0.4 < ΔEN

Two metals have always a metallic bond

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Calculate the mass of 20.0 moles of sc<br>

zhuklara [117]

Answer:

900g

Explanation:

Given parameters:

Number of moles of Sc = 20moles

Unknown:

Mass of Sc = ?

Solution:

To find the mass of the scandium given, we use the expression below:

Mass = Number of moles x molar mass

Molar mass of Sc = 45g/mol

So;

Mass of Sc = 20 x 45 = 900g

7 0

3 years ago

PLZ HELP I WILL REWARD BRAINLIEST IF U ANSWER CORRECTLY WITH A REASON WHY :)

Semmy [17]

Answer:

The answer is dipole-dipole forces.

Explanation:

The molecule is composed of Sulfur and Oxygen, which are both elements with high electronegativities. As a result, this is a covalent bond, as they are both nonmetals. Since Sulfur has a partially positive charge, and Oxygen has a partially negative charge, it appears that the substance is polar, meaning that there are different charges within the atom. Of the answer choices, Dipole-Dipole forces are the only ones that involve polar substances, and they different charges, especially since there is no hydrogen indicating a hydrogen bond, and London forces contain nonpolar substances with an overall charge of the molecule.

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3 years ago

What is a chemical compound and how is it used?

horrorfan [7]

Chemical Compound- a chemical substance consisting of 2 or more different chemically bounded chemical elements with a fixed ratio determining the composition. It is commonly used for electricty

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3 years ago

How do planets with larger masses apply greater gravitational forces on objects compared to planets with less mass?

natta225 [31]

Answer:

more massive objects will attract each other with a greater gravitational force. So as the mass of either object increases, the force of gravitational attraction between them also increases.

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3 years ago

Read 2 more answers

Determine the oxidation states of the elements in the compounds listed. None of the oxygen-containing compounds are peroxides or

Ahat [919]

Answer :

Oxidation number or oxidation state : It represent the number of electrons lost or gained by the atoms of an element in a compound.

Oxidation numbers are generally written with the sign (+) and (-) first and then the magnitude.

Rules for Oxidation Numbers are :

The oxidation number of a free element is always zero.
The oxidation number of a monatomic ion equals the charge of the ion.
The oxidation number of Hydrogen (H) is +1, but it is -1 in when combined with less electronegative elements.
The oxidation number of oxygen (O) in compounds is usually -2.
The oxidation number of a Group 17 element in a binary compound is -1.
The sum of the oxidation numbers of all of the atoms in a neutral compound is zero.
The sum of the oxidation numbers in a polyatomic ion is equal to the charge of the ion.

Now we have to determine the oxidation state of the elements in the compound.

(a) $H_2SO_4$