periodic table

• The table is called a periodic table because similar properties occur at regular intervals
• periodic table is arranged in vertical columns called

  groups
• the rows in the periodic table are called

  periods
• elements in the periodic table are arranged inorder of

  increasing atomic number

  
• groups show how many

  outer electrons in an atom
• outer electrons are called

  valence electrons
• sodium is which group

  group 1

  
• magnesium is in which group

  group 2

  
• Sodium in Group 1 , it will lose 1 electron and form an ion with a 1+ charge

  
• Aluminium in Group 3 , it will lose 3 electrons and form an ion with a 3+ charge

  
• hydrogen is not a

  metal

  
• metals at the centre of the table of the table are

  transition metals

  
• non-metals are usually found at the

  right side of the table

  
• alkaline earth metals are in which group

  2

  
• Alkali metals are in group

  one

  
• noble gases are in which group

  8

  
• halogens are in group

  7

  
• what is the proton number for lithium

  3

  
• what is the proton number for fluorine

  9

  
• what is the proton number for chlorine

  17

  
• the proton number for calcium is

  20

  
• first shell accommodates how many electrons

  2

  
• second shell accommodates how many electrons

  8

  
• write the electronic configuration of lithium

  2,1

  
• in electronic configuration the first number represents the

  first shell

  
• the number of shells shows the number of periods and the number of outer electrons shows the group number