REVIEW TEST IN CHEMISTRY

A car tire runs over an aluminum can and crushes it completely. Which statement is true for the atoms in the structure of the can?

• A. The atoms are broken.

• B. The atoms are flattened.

• C. The atoms remain the same.

• D. The atoms are changed into different atoms.

Which of the following is composed of two or more atoms chemically bonded together?

                                 

 

• A. Atom 

•    B. Compound   

• C. Element  

•        D. Molecule  

Which is TRUE about the atomic models of Bohr and Rutherford?

Bohr’s atomic model _____; Rutherford’s atomic model _____.

        

 

• A. is a solid sphere; is a nuclear model

• B. came before Rutherford’s; came after Bohr’s atomic model

• C. defines the nucleus in an atom; defines the energy level in an atom   

• D. defines the energy level in an atom; defines the nucleus in an atom

Among those scientists, who discovered that an atom has a central core called a nucleus?

                                             

                               

•   A. Niels Bohr   

• B. J.J. Thomson  

• C. John Dalton

• D. Ernest Rutherford

Which atomic models are in the CORRECT order from the time of John Dalton to Erwin Schrodinger?

• A. Solid Sphere, Plum Pudding, Nuclear, Planetary, and Quantum Mechanical Model

• B. Plum Pudding, Solid Sphere, Planetary, Nuclear, and Quantum Mechanical Model

• C. Quantum Mechanical, Planetary, Nuclear, Plum Pudding and Solid Sphere Model

• D. Nuclear, Planetary, Solid Sphere, Plum Pudding, and Quantum Mechanical Model 

Who among the following scientists led to the discovery of the sub-atomic particle called “neutron”?

                                   

                         

•   A. Niels Bohr     

• B. J.J. Thomson      

•  C. James Chadwick

•    D. Ernest Rutherford

Who among the following scientists used the “Uncertainty Principle” which states that it is impossible to determine the exact location of an electron?

                                      

                                       

• A. Erwin Schrödinger

• B. J.J. Thomson 

•      C. Niels Bohr

• D. Werner Heisenberg

Which subatomic particle is in the nucleus of an atom that is positively charged in nature?

                                            

•       A. electron   

•     B. neutron 

•   C. positron    

•     D. proton

What subatomic particle does not carry any charge or is neutral?

                                           

 

• A. atom   

• B. electron

• C. neutron

• D. proton

Which subatomic particle orbits around the nucleus of an atom?

                                    

• A. electron    

•    B. neutron   

•      C. positron    

• D. proton