What is the definition of a Double Displacement Reaction?

Answers

Answer 1

Answer:

Answer:

A double displacement is a type of chemical reaction that in which the reactant ions exchange places to form new products

Explanation:

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Answer 2

Answer:

When two different atoms or groups of atoms are exchanged, then it is a double displacement reaction.

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What is the number of electrons in a completely filled second shell of an atom?(1) 32 (2) 2 (3) 18 (4) 8

Answers

The number of electrons in a completely filled second shell of an atom will be 8.

What is atom?

The basic number of ordinary components that make up a chemical element is just an atom.

What is shell?

As per Bohr's atomic model, electrons orbit or shell surrounding the nucleus in a precise circular path.

It is known that by the electronic configuration atoms posses 2,8,18,32.

Hence, there are 8 electron will be found in second shell of the atom.

The number of electrons in a completely filled second shell of an atom will be 8.

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The number of electrons in a completely filled second shell of an atom is 8.
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A covalent bond in which electrons are shared unequally isa. polar.
b. a double bond.
c. ionic.
d. polyatomic.

Answers

Covalentbonds = sharing of electrons between two atoms of the same elements or elementsclose to each other on the periodic table. Usually they are metals sometimesnon-metals. In polar bonds electrons areshared unequally. Non polar bonds share electrons equally.

Final answer:

A covalent bond where electrons are shared unequally is known as a polar bond. This unequal sharing occurs due to differences in electronegativity between the two atoms involved in the bond.

Explanation:

A covalent bond in which electrons are shared unequally is defined as a polar bond. This corresponds to option a) polar. This occurs because one atom is more electronegative and pulls the shared electron pair towards its nucleus making the bond polar, having a partial positive and partial negative end. Option b) a double bond, refers to a covalent bond where two pairs of electrons are shared between atoms. Option c) ionic refers to a bond where electrons are completely transferred from one atom to another and option d) polyatomic refers to a molecule that consists of more than two atoms.