Periodic table

• describe why nobel gases are unreactive

  nobel gases (group 0) are unreactive because of there full outer shell
• what are all of group 1 called

  alkaline metals
• what are group 7 called on the pereodic table


  hallogens
• what are group 0 called on the peredoic table

  noble gasses
• The maximum number of electrons per shell, in order of increasing shell number (from 1 to 4) was said to be respectively 2, 8, 8, and 18.
• the transition metals are the pink block in the middle of the periodic table.

  
• Why is copper used for wires

  Copper is used for wires as it is a good conductor of electricity
• The group the element is in links to the…

  Amount of electrons in its outer shell. Thats what makes group 1 so reactive. It has only 1 elelectron in the outer shell.
• do group 0 (nobel gasses) react

  group 0 have full outer shells therefore are unreactive
• Group 1 elements, known as alkali metals (e.g., lithium, sodium, potassium), have one electron in their outer shell, making them highly reactive and eager to lose this electron to form +1 ions. They are soft, have low density, and low melting points, with reactivity increasing down the group. In contrast, 


  The structure of group 1
• Group 7 elements, known as halogens (e.g., fluorine, chlorine, bromine, iodine), have seven electrons in their outer shell, making them highly reactive as well, but they gain one electron to form -1 ions. Halogens exist in various states (gases, liquid, solid), and their reactivity decreases down the group. The differing electron configurations of these groups account for their distinct chemical behaviors.


  The structure of group 7
• give two differences between the physical properties of the elements in group 1 and those of the transition elements.


  Transition metals are much stronger, denser and harder than the group 1 elements. Their melting points are also much higher.
• explain the trend of reactivity as you go down group 1?


  As you go down Group 1 (the alkali metals), the reactivity increases
• what is the trend of reactivity as you go down group 7?


  As you go down Group 1 (the alkali metals), the reactivity increases.
• compare group 1 to group 7


  Group 1 consists of soft, shiny metals with one electron in their outer shell. They are very reactive and easily lose this outer electron. As you go down this group, the atoms get larger, making them even more reactive. Group 7 consists of reactive nonmetals with seven electrons in their outer shell. They gain one electron during reactions. Although the atoms also get larger down the group, their reactivity decreases because it becomes harder to attract an extra electron. So, Group 1 metals react by losing an electron, while Group 7 nonmetals react by gaining one.
• why do Alkali metals become more reactive as you move down Group 1 ?


  Alkali metals become more reactive as you move down Group 1 because the atoms get larger, placing the outer electron further from the nucleus. This weakens the attraction between the outer electron and the nucleus, making it easier for the atom to lose this electron during reactions.
• Why does reactivity increase down Group 1?

  • Outer electron is further from the nucleus, weaker attraction, easier to lose.
• Why does reactivity decrease down Group 7?

  • Outer shell is further from the nucleus, harder to gain an electron.
• Why are noble gases unreactive?

  full outer shell
• explain how electron configuration determines its position on the periodic table.

  the number of shells on the atom determine the period (row), the number of electrons in the outer shell determines its group (column)
• why do elements in group 1 decrease in reactivity as you go down?

  1 electron on outer shell, as you go down, the electron is further from the nucleus due to more shells, this weakens the attraction between the nucleus and outer electron, making it easier lose.
• how do the properties of group 1 metals compare with transition metals?

  Group 1 metals are soft and have low density, often low enough to float on water. In contrast, transition metals are hard, strong, and have high density. Group 1 metals have low melting and boiling points, whereas transition metals have high melting and boiling points.

  Group 1 metals are very reactive, especially with water, while transition metals are much less reactive. Group 1 metals always form +1 ions, but transition metals can form multiple ions, such as +2 and +3. Transition metal compounds are often coloured and many act as catalysts, while Group 1 compounds are usually white and do not act as catalysts.