periodic table

• how many elements are there in the periodic table ?

  116 elements
• what row of elements is a period ?

  horizontal row
• what column of elements is a group ?

  vertical column
• which side of the periodic table are metals ?

  left side
• which side of the periodic table are non-metals ?

  right side
• what indicates the valence electron in the element ?

  group number indicates the valence electron in the element.
• what is valence electron ?

  valence electron is the number of electron on the outermost shell.
• what is group 1 also known as ?

  alkali metals / alkaline earth metals
• what type of metals are group 1 ?

  soft metals
• what is group 1 valence electron ? and state why .

  group 1 valence electron is 1 because their group number is 1 .
• does group 1 have low or high melting point ?

  low melting point
• does group 1 have low or high boiling point ?

  low boiling point
• will the group 1 melting and boiling point increase or decrease ?

  decrease
• group 1 reactivity increase or decrease ?

  increase
• what colour is the flame test for lithium ?

  red flame
• what colour is the flame test for sodium ?

  yellow flame
• what colour is the flame test for potassium ?

  lilac flame