periodic table

• Elements can be metals, nonmetals, or metalloids depending on their properties.
• what are silicon and germanium used for?

  Semiconductor materials.
• what is elements from group 14 used for?

  computers
• which group is the most stable in the periodic table?

  noble gases (group 18)
• which two groups in the periodic table react aggressively?

  Alkali metals and halogens.
• why are noble gases stable?

  Full valence shells.
• what is the scientific term for 'non-reactive'

  inert
• what colour flame does Lithium produce when on fire?

  Red
• what colour flame does Potassium produce when on fire?

  Lilac
• what colour flame does Sodium produce when on fire?

  Orange