L3 Flashcards
What is electronic structure?
The way that electrons are arranged in an atom.
How can electronic structure be written?
Each number of electrons on each shell has to be separated with a comma(s) or a dot(s): e.g. sodium’s electronic structure is 2,8,1.
What does reactivity mean?
When two atoms react, they chemically bond and become a new compound.
What special name do the group 0 atoms (the last group of atoms on the periodic table) have?
They are called noble gases.
Why do noble gases not have to react?
They have full outer shells, meaning they are already naturally stable.
Why can atoms not part of the noble gases react with other atoms?
They don’t have a full outer shell, meaning they aren’t fully stable so they will react to another atom to get a full outer shell and become stable.
Which atoms are the noble gases?
Helium, Argon, Neon, Krypton, Xenon, Radon, Oganesson.
What are the atoms in group 1 of the periodic table called?
The alkali metals.
Are the alkali metals reactive?
They are very reactive metals.
Where are they stored and why?
They are stored in oil to prevent them from reacting with air and water.
Do they have a set rule for their electronic structure?
They all have 1 electron in the outer shell.
How can an alkali obtain a full outer shell and become stable?
By losing an electron.
How can they lose an electron?
They can react with other atoms e.g. when lithium (Li) reacts with oxygen (O) and hydrogen (H) it makes Lithium hydroxide (LiOH), making lithium losing its outer shell.
Does the reactivity increase or decrease as we look down group 1?
It increases. If more energy I required to remove an electron, then that atom is less reactive and atoms that require less energy to remove an electron are more reactive.
What are the atoms in group seven called?
The halogens.
