Assessment on the Basics
-Write the chemical name next to the symbol and vice versa:

Cl  ________________________ Lead  _______
Mn ________________________ Gold  _______
P  ________________________  Potassium _______
S ________________________ Calcuim   _______
Fe ________________________ B romine _______
 

-Fill in the blanks below:

An isotope is an atom of one element which has the same number of ___________  and _____________, but a different number of _______________.

An ion is an atom of one element which has the same number of ___________  and _____________, but a different number of _______________.
 

Ionic bonds form when ____________________________________________.
They form between _______________ and ______________.

Covalent bonds form when ________________________________________.
They form between _______________ and ______________, and between _______________ and _______________.
 
 

-Short answer:

Whar is the difference between the atomic number and the atomic mass of an element?
 
 

Why did Mendeleev arrange the elements “periodically”?
 
 
 
 

What do all the alkali metals have in common?
 
 
 

Why are the elements in the last column called “noble” gases?
 
 
 

What are diatomic elements?  List them.
 
 

Draw Cl2 in electron dot notation.
 
 

Write the electron configuration of the following elements:

He:

Cl:

Ca:

K+1:
 


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