1.
Which of the following statements regarding atomic particles is false?
A. 
Protons are found in the nucleus and are positively charged particles
B. 
Electrons move around the nucleus and contribute little to the mass of the atom
C. 
Neutrons are found in the nucleus and they have no charge
D. 
The numbers of neutrons, protons and electrons are always equal in a neutral atom
2.
Mass number refers to:
A. 
The number of protons in the nucleus of an atom.
B. 
The number of electrons in an atom.
C. 
The number of neutrons in an atom.
D. 
The total number of protons and neutrons in the nucleus of an atom.
3.
Atoms of the same element which have the same number of protons but a different number of neutrons are known as
A. 
B. 
C. 
D. 
4.
Which of the following determines the size of an atom?
A. 
The number of protons in the atom.
B. 
The number of neutrons in the atom.
C. 
The size of the nucleus of the atom.
D. 
The number of electrons in the atom.
5.
The electron configuration: 2, 8, 4 is that of:
A. 
B. 
C. 
D. 
6.
The electron configuration for Al3+ is
A. 
B. 
C. 
D. 
7.
Which of the following is the most important factor in determining the chemical properties of an element?
A. 
The total number of electrons in its atoms.
B. 
The number of protons in the nucleus of its atoms.
C. 
The number of neutrons in the nucleus of its atoms.
D. 
The number of valence electrons in its atoms.
8.
The number of valence electrons in an atom is equal to
A. 
The number of electrons in the atom.
B. 
The charge on a positive or negative ion formed by that atom.
C. 
The number of electrons in the outer energy level of the atom.
D. 
The number of electrons needed to fill all the energy levels of the atom.
9.
An element, X, has the following electron configuration: 2, 5The atomic number of element X would be:
A. 
B. 
C. 
D. 
10.
An element, X, has the following electron configuration: 2, 5The number of valence electrons in element X is
A. 
B. 
C. 
D. 
11.
The number of valence electrons in the Group 2 elements of the Periodic Table is
A. 
B. 
C. 
D. 
12.
Which of the following species does NOT have a stable electron configuration (i.e. like those of an inert gas)?
A. 
B. 
C. 
D. 
13.
If an element has the electron configuration: 2, 8, 2 then it would most likely form an ion of charge
A. 
B. 
C. 
D. 
14.
Which one of the following statements about atomic structure is TRUE?
A. 
The numbers of protons, neutrons and electrons is always equal in a neutral atom.
B. 
The numbers of protons and neutrons are always equal in a neutral atom.
C. 
The numbers of neutrons and electrons are always equal in a neutral atom.
D. 
The numbers of protons and electrons are always equal in a neutral atom.
15.
Electrons are thought to be located in distinct energy levels or shells in an atom. The maximum number of electrons which can be found in the third (n=3) shell of an atom is:
A. 
B. 
C. 
D. 
16.
Which one of the following is the most important factor that determines the chemical properties of an element?
A. 
The number of protons in the nucleus of the atom.
B. 
The total number of electrons in the atom.
C. 
The number of valence electrons in the atom.
D. 
The number of neutrons in the nucleus of the atom.
17.
Consider three elements A ,B and C which have atomic numbers less than 20. The atomic number of A and B are x and (x-3) respectively. Element A forms cations with formula A+ and forms a solid substance AC when it reacts with element C.What would be the formula of a compound formed by combining elements A and B?
A. 
B. 
C. 
D. 
18.
Consider three elements A ,B and C which have atomic numbers less than 20. The atomic number of A and B are x and (x-3) respectively. Element A forms cations with formula A+ and forms a solid substance AC when it reacts with element C.Which one of the following elements could be A?
A. 
B. 
C. 
D. 
19.
Consider three elements A ,B and C which have atomic numbers less than 20. The atomic number of A and B are x and (x-3) respectively. Element A forms cations with formula A+ and forms a solid substance AC when it reacts with element C.Which one of the following elements could be B?
A. 
B. 
C. 
D. 
20.
Consider three elements A ,B and C which have atomic numbers less than 20. The atomic number of A and B are x and (x-3) respectively. Element A forms cations with formula A+ and forms a solid substance AC when it reacts with element C.The most likely type of bond formed between A and B would be:
A. 
B. 
C. 
D.