AQA GCSE CHEMISTRY 3- The periodic table

?
Outline Newlands periodic table and ideas.
he proposed the law of octaves- similar properties are reapeated every 8th element. he put the 62 elements into 7 groups accourding to their atomic weight. the properties did not match well so his ideas where dismissed.
1 of 21
Outline Mendeleev's table and why it was better.
He left gaps for undiscovered elements, groups of known elements had simular properties, he predicted the properties of the missing elements and was proven correct. his ideas were accepted and his table was the basis of the modern one.
2 of 21
In the modern periodic table the ________ number determines an elements position in the periodic table.
atomic
3 of 21
What determines an elements chemical properties?
The number of electrons in the outermost shell.
4 of 21
The group number is equal to the_____________________.
the number of the electrons in the outermost shell.
5 of 21
How can we explain trends in reactivity as we go down a group in terms of?
the distance between the outermost electrons and the nucleus. the number of occupied inner shells in the atoms.
6 of 21
The elements in group 1 of the period table are called_______________.
alkali metals
7 of 21
These metals react with ____________ to produce __________ and an alkaline solution containing metal ___________.
water, hydrogen, hydroxide
8 of 21
Do they form negative or positive ions?
positive ions with the charge of +1 in reactions
9 of 21
There compounds are usually___________ or _____________ crystals that _________ in water producing colourless solutions.
white, colourless, dissolve
10 of 21
The reactivity ________ going down the group. and why?
increases because the outer shell is less strongly connected to the nucleus.
11 of 21
Do transition metals have higher or lower melting and boiling points compared to alkali metals?
much higher
12 of 21
They are also much ______ and ________, but much less ______.
stronger, harder, reactive.
13 of 21
What do they not react vigorously with?
oxyen and water
14 of 21
They can form ____ with _______ charges and coloured _____
ions, different, compounds
15 of 21
What are they good at
being industrial catalysts
16 of 21
What do halogens form?
ions with a single negative charge in their ionic compounds with metals
17 of 21
What group are halogens?
group 7
18 of 21
Halogens form _________ __________ by sharing _______ with other non-metals.
covalent, compounds, electrons
19 of 21
A more ________ halogen can _______ a less reactive halogen from a _______ of one of its _____.
more reactive,displace, a solution, salts.
20 of 21
The reativity of halogens _____ going down the group. Why?
decreases, the attraction of the outer shells electrons to te nucleus decreases as the number of occupied energy levels increases.
21 of 21

Other cards in this set

Card 2

Front

Outline Mendeleev's table and why it was better.

Back

He left gaps for undiscovered elements, groups of known elements had simular properties, he predicted the properties of the missing elements and was proven correct. his ideas were accepted and his table was the basis of the modern one.

Card 3

Front

In the modern periodic table the ________ number determines an elements position in the periodic table.

Back

Preview of the front of card 3

Card 4

Front

What determines an elements chemical properties?

Back

Preview of the front of card 4

Card 5

Front

The group number is equal to the_____________________.

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all The Periodic Table resources »