C3 revision

How did Mendeleev organize his own version of the periodic table

He left gaps which allowed for undiscovered elements to be predicted
How was the periodic table organized during the early 1800's?

by atomic mass
when did Dimitri Mendeleev create his table of elements

1869
what is the modern periodic table based on?

Atomic structure
What subatomic particle is set on the outer shells?

Electrons
If the nucleus is further away from the outermost shell, is the force of attraction bigger or smaller?

Smaller
Why do group 7 elements become less reactive the further down the group?

The electrons on the outer shell is further away from the nucleus so there is less force between the nucleus and electrons
how do you tell if a reaction is exothermic or endothermic?
- if a reaction is exothermic there is less energy in the products then the reactants
- if the reaction is endothermic then there is more energy in the products then in the reactants
Where are the transition metals on the periodic table?

Between group 2 and 3.
What is a reversible reaction?

where the products of the reaction can react themselves to produce the original reactants.
What is the dysfunctional group of carboxylic acids?

-COOH

Author

LukeEvans

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Card Set

C3 revision

Description

cards that help with overall revision for C3

Updated

2017-04-26T12:50:04Z