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OCR Chemistry A level > Chapter 5- Electrons and bonding > Flashcards

Chapter 5- Electrons and bonding Flashcards

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1
Q

What are shells made up of?

A

Orbitals

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2
Q

What shape is an s orbital?

A

Sphere

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3
Q

How many electrons can an orbital hold?

A

2

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4
Q

How many electrons can an s orbital hold?

A

2

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5
Q

How many electrons can an p orbital hold?

A

2

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6
Q

How many electrons can an p shell hold?

A

6

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7
Q

How many electrons can an d orbital hold?

A

2

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8
Q

How many electrons can an d shell hold?

A

10

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9
Q

Write the order the electrons fill the shells, ending with 4f.

A

1s,2s,2p,3s,3p,4s,3d,4p,4d,5s,4f

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10
Q

What Is the electron configuration of Sulfur?

A

1s2 2s2 2p6 3s2 3p4

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11
Q

Write the shorthand electron configuration of Calcium.

A

[Ar] 4s2

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12
Q

What Is the electron configuration of an Oxygen ion?

A

1s2 2s2 2p6

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13
Q

Write the shorthand electron configuration of an Oxygen ion.

A

Ne

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14
Q

Define Ionic bonding

A

The electrostatic attraction between positive and negative ions.

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15
Q

Name one polyatomic ion with a negative charge and one polyatomic ion with a positive charge

A

NO3-,OH-, SO4 2-,

NH4+

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16
Q

What name is given to the structure of all ionic compounds

A

Giant Ionic Lattice

17
Q

Why do ionic compounds have high meting and boiling points?

A

Strong electrostatic forces of attraction between the oppositely charged ions which require a lot of energy to break therefore a high temperature is needed, so they have a high meting point and boiling point

18
Q

Why do ionic compounds only conduct electricity when molten or dissolved in water?

A

When solid, the ions cannot move, so cannot pass a charge through the.
When molten or dissolved in water, the ions can move to pass the charge through the solution, so it does conduct electricity.

19
Q

Define covalent bonding.

A

The strong electrostatic attraction between a shared pair of electrons and the nuclei of bonded atoms.

20
Q

What are lone pairs?

A

Paired electrons that are not shared

21
Q

Why can sulfur form SF2, SF4 and SF6?

A

Different arrangement of electrons in shells

22
Q

What is a dative or coordinate bond?

A

A covalent bond in which the shared pair of electrons has been supplied by one of the bonding atoms only.

23
Q

Name an ion which contain a dative bond

A

NH4+

OCR Chemistry A level (28 decks)

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