Chapter 8 Grade 12 SABIS Chemistry Atomic Structure and Periodicity

Question 1 of 11

2

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First ionization energy of sodium causes an ( Atom, Ion ) to be changed to an ( Ion, Atom )

Explanation

Question 2 of 11

1

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First ionization energy of sodium causes an electron to be ( gained, lost )

Explanation

Question 3 of 11

2

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Ionization energy is ( added, removed ) as it ( creates, breaks ) a bond between electron and atom

Explanation

Question 4 of 11

6

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Write equations to illustrate the first and second ionisation energies of sodium.

Na() --> Na(g) +
Na+()--> Na+(g) +

Explanation

Question 5 of 11

3

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Explain why the second ionization energy of any atom is always larger
than its first
The 1st e- is being removed from a ( neutral atom, positive 1 ion ) whereas the second electron is being
removed from a ( +1 ion, neutral atom ), the same nuclear charge is attracting a smaller number of
electrons, so the electrons are held ( more firmly, more weakly ).

Explanation

Question 6 of 11

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The second ionisation energy of sodium is around 9 times larger than its first, while the
third is only around 1.5 times larger than its second. Suggest why this is so.
The electron being removed from Na+ is from ( 2p, 2s ) orbitals which are ( closer, farther away ) to the
nucleus, shielded less, so more closely attracted to the nucleus. This makes them
( easier, harder ) to be removed.
The electron being removed from Na+2 is also from 2p orbitals which are relatively the
same distance from the nucleus, same shielding, so attracted to the nucleus slightly
more. This makes them only a little ( harder, easier ) to be removed.

Explanation

Question 7 of 11

4

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Na is larger ⇒more
The electron being removed in Li is the and the electron being removed in Na is the
. The electron in 3s is from the nucleus

Explanation

Question 8 of 11

1

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Why is the ionisation energy of sodium less than that of magnesium?
For the same shielding Mg has ( higher, less ) nuclear charge.

Explanation

Question 9 of 11

3

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Why is the ionisation energy of aluminium less than that of magnesium?
Al: 1s2 2s2 2p6 3s23p1
Mg: 1s2 2s2 2p6 3s2
Removing ( 3s, 3p ) electrons is easier than removing ( 3s, 3p ) electrons because ( 3p, 3s ) are more
energetic.

	Created by Hisham Mahmoud over 3 years ago

Chapter 8 Grade 12 SABIS Chemistry Atomic Structure and Periodicity

Chapter 8 Grade 12 SABIS Chemistry Atomic Structure and Periodicity

Question 1 of 11

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First ionization energy of sodium causes an Atom Ion( Atom, Ion ) to be changed to an Ion Atom( Ion, Atom )

Explanation

Question 2 of 11

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First ionization energy of sodium causes an electron to be gained lost( gained, lost )

Explanation

Question 3 of 11

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Ionization energy is added removed( added, removed ) as it creates breaks( creates, breaks ) a bond between electron and atom

Explanation

Question 4 of 11

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Write equations to illustrate the first and second ionisation energies of sodium. Na() --> Na(g) + Na+()--> Na+(g) +

Explanation

Question 5 of 11

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Explanation

Question 6 of 11

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Explanation

Question 7 of 11

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Na is larger ⇒more The electron being removed in Li is the and the electron being removed in Na is the . The electron in 3s is from the nucleus

Explanation

Question 8 of 11

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Why is the ionisation energy of sodium less than that of magnesium? For the same shielding Mg has higher less( higher, less ) nuclear charge.

Explanation

Question 9 of 11

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Why is the ionisation energy of aluminium less than that of magnesium? Al: 1s2 2s2 2p6 3s23p1 Mg: 1s2 2s2 2p6 3s2 Removing 3s 3p( 3s, 3p ) electrons is easier than removing 3s 3p( 3s, 3p ) electrons because 3p 3s( 3p, 3s ) are more energetic.

Explanation

Question 10 of 11

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IE decreases increases( decreases, increases ) down a group

Explanation

Question 11 of 11

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IE decreases increases( decreases, increases ) across a period

Explanation

First ionization energy of sodium causes an ( Atom, Ion ) to be changed to an ( Ion, Atom )

First ionization energy of sodium causes an electron to be ( gained, lost )

Ionization energy is ( added, removed ) as it ( creates, breaks ) a bond between electron and atom

Write equations to illustrate the first and second ionisation energies of sodium.

Na() --> Na(g) +
Na+()--> Na+(g) +

Na is larger ⇒more
The electron being removed in Li is the and the electron being removed in Na is the
. The electron in 3s is from the nucleus

Why is the ionisation energy of sodium less than that of magnesium?
For the same shielding Mg has ( higher, less ) nuclear charge.

Why is the ionisation energy of aluminium less than that of magnesium?
Al: 1s2 2s2 2p6 3s23p1
Mg: 1s2 2s2 2p6 3s2
Removing ( 3s, 3p ) electrons is easier than removing ( 3s, 3p ) electrons because ( 3p, 3s ) are more
energetic.

IE ( decreases, increases ) down a group

IE ( decreases, increases ) across a period