Random Periodic Table Yest Im Getting 2 Stressed About 4 No Reason Legit Flashcards
(46 cards)
Group 1 metals + water = ?
An alkali hydroxide
Which way up/down the periodic table do group 1 metals they get softer?
Down lmao
What group 1 metal has the highest melting point?
Lithium
Why does lithium have the highest melting point?
The electrostatic attraction between cations and the delocalised electrons is strongest because lithium has the smallest ions
Why are group 1 metals highly reactive?
They only have 1 electron in their outer shell, so it’s easy to lose
What is the equation for the reaction of Lithium (1) and oxygen
4 Li + O -> 2 Li2O
What is the equation between Li(1) and Br(7)?
2 Li + Br -> 2 LiBr
What is the equation between Lithium(1) and water ?
2 Li + 2 H20 -> 2 LiOH + H2
How do we know alkali metals have a low density?
They float !!
How do we know the alkali metals are exothermix with water ?
They form a molten ball / or burst into purple flame
Why do the alkali metals increase in reactivity down the group?
They increase in size down the group, so the outer shell of electrons is more shielded.
There is less attraction between the positive nucleus and the negative electron, therefore it will be easier to lose the electron from its outer shell
What group are diatomic elements n what does this mean (maybs a diagram? :)))
The halogens
- each atom is held together by a single covalent bond
Why does the melting point increase down group 7
Going down the group the size of the molecule increased and so the strength of intermolecular force increases so more energy would be needed to break them
What is the test for chlorine?
Damp blue litmus paper turns red then bleaches white
Why does the reactivity decrease down group 7?
The size of the atoms increase down the group and so the outer shell of electrons is more shielded
There is less attraction between the positive nucleus and the outer shell, so it’s harder to gain an electron
What is the most reactive element in group 7?
F
Why are the noble gases unreactive?
They have a full outer shell of electrons and so they don’t need to lose or gain electrons
What colour is the vapour of noble gas
Colourless
What is the mass no.
No. Of protons and neutrons in nucleus
Where is mass number?
On the top
What is the atomic number
The number of protons in the nucleus
Where is the staircase from
Between Al and B
colour of chlorine
pale green
colour of bromine solid
red-brown
