The Periodic Table Flashcards
What are the vertical columns called in the periodic table?
Groups
What are the horizontal rows called?
Periods
What determines the order of elements in periodic table?
Atomic number of the element
Group number is the same as what in the outer shell?
Electrons
What does the period number tell us?
The number of shells of electrons
Do the size of atoms increase or decrease across the periods?
Decrease
Do the size of atoms increase or decrease down a group?
Increase
Group 1 contains the most reactive metals. contain? What are they called?
Alkali metals
How many electrons are in each outer shell in each of group 1?
1
Group 1 is descending. Do the metals become more or less reactive?
More reactive
Group VII (7) are the most reactive non-metals. What are they known as?
Halogens
How many electrons are in the outer shells of Group VII?
7
As Group VII descends, do the Halogens become more or less reactive?
Less reactive
Group 0 (8) are all unreactive non-metals.What are they known as?
Noble or Inert Gases
Why do Group 0 (8) not react?
Because they have a full outer shell.
What are the block of metals between Group 2 and 3 called?
The transition metals
What do the transition metals form?
They form coloured compounds and are unreactive
Is hydrogen a metal or a non-metal?
Non-metal
There are limitations to the periodic table. Name 2 semi-metals
Silicon (Si) and Germanium (Ge)
What are the properties of semi-metals?
They show properties of meatals and non-metals.
Conducts small amounts of electricity.
What is carbon (graphite) ?
A non-metal which conducts electricity
What is an Exothermic Reaction?
Gives out heat to its surroundings and the temperature rises.
What is an endothermic reaction?
Takes in heat from its surroundings and the temperature falls.
