C4 - Chemical Patterns Flashcards
What did Dobreiner do in terms of the periodic table?
He arranged elements into groups of three called triads. The elements in each triad has similar chemical properties and the relative atomic mass of the middle one was about halfway between the other two.
What did John Newlands do in terms of the periodic table?
He arranged the known elements in order of relative atomic mass and found similar properties amongst every eighth element in the series.
What did Dimitri Mendeleev do in terms of the periodic table?
He used his periodic table to predict the existence of other elements.
What is a group in the periodic table?
A vertical column of elements make a group.
What is a period in the periodic table?
A horizontal row of elements make a period.
What is the relative mass of a proton?
What is the relative mass of a neutron?
What is the relative mass of an electron?
- 1
- 1
- 0 (nearly)
What is the relative charge of a proton?
What is the relative charge of a neutron?
What is the relative charge of an electron?
+1
0
-1
Spectroscopy: What colour flame is produced when lithium is put into a Bunsen flame?
Red
Spectroscopy: What colour flame is produced when sodium is put into a Bunsen flame?
Yellow
Spectroscopy: What colour flame is produced when potassium is put into a Bunsen flame?
Lilac
In group one the further you go down the column, the reactivity increases or decreases?
Increases
In group one the further you go down the column, the higher or lower the melting and boiling point?
Lower
Alkalis react vigorously with chlorine to form….
colourless crystalline salts called metal chlorides.
What is the name for group seven elements?
Halogens
All halogens consist of diatomic molecules. True or false?
True (Cl2, Br2 and I2)
The melting and boiling points of the halogens decrease as we go down the group. True or false?
False. The melting and boiling points of the halogens increase as we go up the group.
the densities increase as you go down the group. True or false?
True
Halogens get more reactive the further down the column you go. True or false?
False. Halogens get less reactive the further down the column you go.
What is an ion?
A charged atom.
What is an atom?
A particle without a charge.
