What does this graph show?

Ionisation energy across period 2

It forms a large molecule with strong van der Waals imf

Forms a macromolecule with many covalent bonds

Repulsion caused by electrons pairing in subshell

What does the graph show?

Ionisation energy across period 3

The number of protons increases

Monatomic means weak Van Der Waals imf

Number of protons increases, Number of shells stays the same

Outer electron is in 2p orbital so further from nucleus

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Periodicity

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AS Chemistry - trends across the periodic table

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Questions 20

Answers

1
Why?
Shielding decreases
Nuclear charge increases
Number of protons stays the same
Atomic radius increases
2
What does this graph show?
Melting point across period 3
Melting point across period 2
Ionisation energy across period 2
Atomic radius across period 3
3
Why?
Strong electrostatic forces of attraction
It forms a macromolecule
It forms an ionic lattice
It forms a large molecule with strong van der Waals imf
4
What happens to ionisation energy down a group?
Stays the same
Increases
Decreases
No pattern
5
Which has the highest melting point?
Ar
S
Cl
P
6
Why?
Forms an ionic lattice
Strong electrostatic forces of attraction
Forms a macromolecule with many covalent bonds
Large molecules have strong intermolecular forces
7
Which is the other exception?
Ne
O
N
F
8
Why?
Outer electron is in 2p orbital so further from nucleus
Repulsion caused by electrons pairing in subshell
Nobody knows ☺
Extra neutrons weaken nuclear charge
9
What happens to atomic radius across a period?
Decreases
Increases
No pattern
Stays the same
10
What does the graph show?
Ionisation energy across period 3
Melting point across period 2
Atomic radius across period 3
Melting point across period 3
11
Which has the highest melting point?
Si
Mg
Na
Al
12
What does the graph show?
Melting point across period 3
Melting point across period 2
Atomic radius across period 3
Ionisation energy across period 3
13
Which is an exception?
Li
B
Be
C
14
What generally happens to ionisation energy across period 2?
It increases
It decreases
15
Why?
The number of shells decreases
Nobody knows ☺
The number of shells increases
The number of protons increases
16
Why?
No free electrons
Monatomic means weak Van Der Waals imf
Weak electrostatic attraction
Few covalent bonds
17
Which has the lowest melting point?
P
Cl
Ar
S
18
What does the graph show?
Melting point across period 2
Ionisation energy across period 3
Atomic radius across period 3
Melting point across period 3
19
Why?
Number of protons decreases
Number of protons increases
Number of shells stays the same
Number of shells increases
20
Why?
The extra neutrons weaken nuclear charge
Outer electron is in 2p orbital so further from nucleus
Repulsion caused by electrons pairing in subshell
Nobody knows ☺

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