Question 1

How many orbitals are there, in total, in the first three quantum shells of an atom?

  A  

3

  B  

6

  C  

9

  D  

14

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Question 2

This question refers to isolated gaseous atoms.

In which atom are all electrons paired?

  A  

Ba

  B  

Br

  C  

S

  D  

Si

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Question 3

The electronic configuration of the two outermost shells of an atom is 3s23p63d54s2.

What is this atom?

  A  

manganese

  B  

phosphorus

  C  

strontium

  D  

vanadium

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Question 4

Which statement about p-orbitals is correct?

  A  

a p-orbital is spherical in shape

  B  

a p-orbital can contain two electrons

  C  

there are six p-orbitals in a p-subshell

  D  

an element with outer configuration of p2 has both electrons in the same p-orbital

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Question 5

An element forms ions with a charge of 3+.

What could be the electron configuration of the atoms of the element?

  A  

1s2 2s2 2p3

  B  

1s2 2s2 2p6 3s2 3p6 3d1 4s2

  C  

1s2 2s2 2p6 3p1

  D  

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p3

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Question 6

What is the shape of an s-orbital?

  A  

circle

  B  

dumbbell

  C  

oval

  D  

sphere

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Question 7

Which element has atoms with the greatest number of singly occupied orbitals?

  A  

C

  B  

Cl

  C  

Ca

  D  

Ga

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Question 8

What is the electron configuration of V2+ in the ground state?

  A  

1s2 2s2 2p6 3s2 3p6 3d3

  B  

1s2 2s2 2p6 3s2 3p6 3d1 4s2

  C  

1s2 2s2 2p6 3s2 3p6 3d3 4s2

  D  

1s2 2s2 2p6 3s2 3p6 3d5 4s2

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Question 9

Which is the electron configuration of an atom with only two unpaired electrons?

  A  

1s2 2s2 2p3

  B  

1s2 2s2 2p4

  C  

1s2 2s2 2p6 3s2 3p5

  D  

1s2 2s2 2p6 3s2 3p6 4s1 3d5

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Question 10

The similarity between metallic elements and ionic compounds is that both

  A  

are held together by forces of attraction between positive and negative ions

  B  

are held together by electrostatic forces

  C  

consist of lattices containing only positive ions

  D  

consist of giant structures of atoms

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Question 11

A molecule is

  A  

a group of atoms bonded by ionic bonds

  B  

a group of atoms bonded by covalent bonds

  C  

a group of ions bonded by covalent bonds

  D  

a group of atoms bonded by metallic bonds

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Question 12

Metals are good conductors of electricity because

  A  

metal atoms are arranged in a regular lattice

  B  

metal ions are very close to each other

  C  

metal ions are free to move through the lattice

  D  

electrons are free to move through the lattice

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Question 13

Which of these has a dative covalent bond?

  A  

NH3

  B  

OH-

  C  

H2O

  D  

 H3O+

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Question 14

The melting temperature of sodium is lower than the melting temperature of magnesium. The best explanation for this is

  A  

sodium atoms are smaller than magnesium atoms

  B  

sodium ions have a larger charge density than magnesium ions

  C  

the repulsion between the ions in sodium is less than in magnesium

  D  

the number of delocalised electrons per atom is fewer in sodium than in magnesium

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Question 15

Which statement about a lattice of sodium chloride is correct?

  A  

the ions are the same size

  B  

the attraction between two sodium ions is greater than the repulsion between two chloride ions

  C  

each sodium ion is surrounded by six chloride ions

  D  

there are more sodium ions than chloride ions

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Question 16

Which molecule is not able to form a co-ordinate bond with another species?

  A  

BH3

  B  

CH4

  C  

NH3

  D  

H2O

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Question 17

In which substance do covalent bonds break when it melts?

  A  

hexane

  B  

ice

  C  

iodine

  D  

silicon dioxide

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Question 18

Which substance contains delocalised electrons?

  A  

cyclohexane

  B  

graphite

  C  

iodine

  D  

sodium chloride

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Question 19

Which compound contains a co-ordinate bond?

  A  

HF

  B  

NH3

  C  

CHCl3

  D  

NH4Cl

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Question 20

Which is not responsible for conduction of electricity?

  A  

the sodium ions in molten sodium chloride

  B  

the electrons between layers of carbon atoms in graphite

  C  

the bonding electrons in a metal

  D  

the lone pair electrons on water molecules

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Question 21

Which set of elements in the solid state contain a simple molecular lattice, a giant covalent lattice and a giant metallic lattice?

  A  

S, Si, Al

  B  

P, Si, C

  C  

S, P, Si

  D  

Mg, P, S

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