Who made the law of octaves?
Who created a spiral to show the elements in order of atomic weight?
Who's periodic table is most similar to the table we use now?
What are the group of elements in the middle of the periodic table called?
In group 1 (the alkali metals) what is the most reactive element?
What is the name of the elements in group 7 called?
In group 7, are the elements more reactive at the top of bottom of the column?
At the top.
As you go down group 1, what happens to the melting points of the metals?
Are alkali or transition metals used in a catalyst?
Why was Mendeleev's periodic table not accepted at first?
He had not discovered all the elements in the table and he swapped some elements around that other scientists did not agree with.
Which produce more colourful salts, transition or alkali metals?
Transition metals make colourful salts
What is a halogen?
An halogen is an element from group 7
What is an halide?
A compound including a halogen
Do alkali metals have a high or low density?
They have a low density compared to transition metals.
Do group 1 metals have high or low boiling/melting points?
They have low boiling/melting points
How many electrons do alkali metals have on their highest energy level?
They have one electron on their outer shell
As you descend group 1 they react more quickly with air, true or false?
True, as you descend group 1 they react more quickly with air
Why are the Metals in group 1 Called Alkali metals?
Because they all form hydroxides which hissolve in water to give strongly alkaline solutions
Why Are alkali metals Stored in Oil?
To prevent Them From reacting with the oxygen in the Air
Why wasn't John newlands theory widely accepted?
Because he was forced to put elements in the same groups as other elements even if their properties weren't similar. For example he put iron in the same group as oxygen
How did mendeleev order his elements in his table?
By atomic mass
What made mendeleevs table so clever?
He knew where gaps were in the table and so predicted what properties the elements would have once they were discovered.
Why did mendeleev's table gain credit after his table was published?
Because the properties of new found elements fit in with his predictions.
How did mendeleev overcome the problems newlands had faced?
He swapped elements around In some circumstances so that the properties were similar
What happens as you go down the list of alkali metals?
They become more reactive
Why are the noble gases unreactive?
Because they have a full outer shell
How many groups are there in the periodic table?
What happens as you go down the list of halogens?
They become less reactive
What was John newlands theory called ?
The law of octaves
A more reactive halogen will do what to a less reactive halogen in a halide solution?
It will displace it