How do Melting points change across the periodic table?

They vary depending on the intermolecular forces

Elements with their valence electrons in the s subshell

Elements with some valence electrons in the d subshell

What interesting phenomenon occurs at the overlap of the s and d orbitals

Electrons fill up the 4s subshell before the 3d

What is an Intermolecular force?

an attractive force between molecules

What is electron affinity

the energy released when an atom gains an electron

What do you think Thermal Stability means?

How easily a compound breaks down using heat

What gives rise to effective nuclear charge?

the number of protons and electrons in the atom

How do successive ionisation energies change in the PTE

They increase with each electron removed

How does Electron shielding change in the PTE?

E.S. increases going down a group

What is Electronegativity?

a measure of the attraction of an atom for other electrons

How does the periodic table show what electrons are in the outermost subshell of an element?

The valence electrons match the group number

an unequal charge within a bond

Define Co-ordinate bonding

1 atom shares its lonepair with another atom

How do Ionisation energies change in the PTE?

I.E. increase across a period, decrease down a group

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AS The periodic table 1 CYC

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AS Chemistry Unit 1.6 WJEC

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Questions 20

Answers

1
Define first ionisation energy
X + e- --> X-
X (g) --> X+ (g) + e-
X (g)+ e- --> X+ (g)
X (g) --> X- (g) + e
2
How do Melting points change across the periodic table?
They vary depending on the intramolecular forces
They increase across a group
They decrease across a group
They vary depending on the intermolecular forces
3
What is the s block?
Alkaline earth metals
Elements with their electrons in the s subshell
Elements with their valence electrons in the s subshell
Group 1 metals
4
What is the d block
Elements with some valence electrons in the d subshell
The transition metals
Elements with their valence electrons in the d subshell
Coloured compounds
5
What interesting phenomenon occurs at the overlap of the s and d orbitals
Electrons fill up the 3d subshell before the 4s
Electrons fill up the 4p subshell before the 3d
Electrons fill up the 2s subshell before the 2d
Electrons fill up the 4s subshell before the 3d
6
What is an Intermolecular force?
a bond between molecules
a bond within a molecule
an attractive force between molecules
a bond between molecules
7
What is electron affinity
the energy released when an atom gains an electron
the energy gained when an atom gains an electron
the energy released when an atom loses an electron
the energy released when an ion loses an electron
8
What do you think Thermal Stability means?
How easily a compound breaks down in a chemical reaction
How easily a compound breaks down when you jump up and down
How easily a compound breaks down using water
How easily a compound breaks down using heat
9
What gives rise to effective nuclear charge?
the number of protons and electrons in the atom
the number of protons in the atom
the number of protons and neutrons in the atom
the number of protons, electrons and neutrons in the atom
10
Which of these does not affect ionisation energy
Number of valence electrons
Electron shielding
Nuclear charge
Distance of outer shell from nucleus
11
What do you think is formed when s block metals react with water?
Metal oxides
Metal hydroxides
Metal carbonates
Precipitates
12
What is an Intramolecular force?
a bond between molecules
an attraction between molecules
a bond within a molecule
an attraction within a molecule
13
How do successive ionisation energies change in the PTE
They increase with each electron removed
They decrease with each electron removed
They increase across a period
They increase down a group
14
How does Electron shielding change in the PTE?
E.S. increases going down a group and across a period
E.S. decreases going across a period
E.S. increases going across a period
E.S. increases going down a group
15
What is Electronegativity?
a measure of the attraction of an atom for other protons
a measure of the attraction of an atom for other electrons
a measure of the attraction of an ion for other electrons
a measure of the attraction of an atom for other ions
16
How does the periodic table show what electrons are in the outermost subshell of an element?
The valence electrons match the mass number
The valence electrons match the group number
The valence electrons match the period
The valence electrons match the proton number
17
What is a dipole?
an unequal charge within a bond
different charges within a bond
an equal charge within a bond
2 separate charges within a bond
18
Define Co-ordinate bonding
2 atoms form ions held together by electrostatic attraction
1 atom donates its lonepair to another atom to become an ion
1 atom shares its lonepair with another atom
2 atoms have a shared pair of electrons with opposing spin
19
How do Ionisation energies change in the PTE?
I.E. increase across a period, decrease down a group
I.E. decrease across a period, increase up a group
I.E. increase across a period, increase up a group
I.E. decrease across a period, decrease up a group
20
What do you think is formed when s block metals react with oxygen?
Metal Hydroxides
Metal Oxides
Hydroxides
Oxides

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