CHAPTER1 THE PERIODIC TABLE SEMESTER 1

Periods<ul><li>Horizontal rows are called “Periods” </li></ul><ul><li>Each period also shows something in common </li></ul>

Rows of elements are called periods.

Groups
<ul><li>Vertical columns are called groups. </li></ul><ul><li>Elements are placed in columns by similar properties. </li><...




 

METALS Non-METALS METALLOIDS

<ul><li>Tall columns are collectively referred to as the “representative elements” </li></ul>

<ul><li>Short, center groups are collectively referred to as the “transition elements” </li></ul>


<ul><li>Two long rows on bottom are collectively referred to as the “inner transition metals” </li></ul>


Image result for valence electrons and group number


Image result for valence electrons and group number

Image result for valence electrons and group number

CHARGES ON IONS AND THE PERIODIC TABLE.

The ion formed by an element can be worked out form the element's position in the periodic table . The elements of group IV and and group VIII generally  do not form ions.

QUESTIONS
1.In the given periodic table mark 
a. one  element in group 4 
b.a noble gas
c.a transition metal
Image result for periodic table
2.How does  the metallic and non-metallic nature of the elements  change across period 3 of the periodic table?






REACTIVITIES OF ELEMENTS: 

Going from top to bottom of a group in the periodic table ,metals become more reactive, but non-metals  becomes less reactive. 







No comments:

Post a Comment

Subscribe to: Posts (Atom)