C2.2 - Electronic Structures And The Periodic (Finished) Flashcards
Why do elements in the same group of the periodic table react in similar ways?
Because their electron structures are the same
What does the group number of the periodic table tell you?
The number of electrons in the outermost shell. This can be used the other way around to find the group number of an element from its structure.
What does the number of shells (energy levels) an atom has tell you about it in relation to the periodic table?
It tells you what row (period) it is in
Where are non metal elements found in the periodic table, and how much of it do they make up?
The top right-hand corner, they make up about 20% of the periodic table
Elements in groups 5, 6 and 7 form which ions?
Negative ions
What are the elements in group 0 (8) called?
The noble gasses
Going down group 0, the elements boiling points _______.
increase
Why are the noble gasses so unreactive?
They have a full outer shell so they don’t want to gain or loose electrons and therefore do not react
What are two properties of metals compared to non-metals
- Metals are good conductors of electricity (non metals are usually electrical insulators)
- In general metals have much higher melting and boiling points than non-metals
- Metals are ductile and malleable whereas non metals are brittle
An element in group 1/2/3 wants to _____ electron(s) to form __/__/__ ions.
Loose
+/2+/3+
Why do elements in the same groups in the periodic table have similar chemical properties?
They have the same number of electrons in their outermost shell so they react similarly. For example all elements in group 1 want to loose an electron to get a full outer shell.
How many electrons does beryllium, Be, have in its outer shell?
2 electrons
Atoms of metals tend to ___ electrons whereas atoms of non metals tend to ___ them
Loose, gain
