Periodic table for SQA Higher Chemistry
This page covers the following topics:
1. Periodic table structure
There are specific names used for some groups of the periodic table:
group 0/8 (18) → noble gases
group 1 → alkali metals
group 7 (17) → halogens
Elements in the same group have similar properties since they have the same number of electrons in their outer shell. For groups 1-2 and 3-8 it is the same as the group number. For example, phosphorus has 5 electrons in its outer shell. If you use a periodic table with 1-18 group numbers, you should convert groups 13-18 to 3-8 respectively as the aforementioned rule doesn’t necessarily apply for the groups 3-12.
As you go down a group, the elements get bigger as they gain additional shells of electrons.
What is the name of group 1 of the periodic table?
Group 1 of the period table is called alkali metals.
Name 3 smallest halogens.
Since going down a group the atomic radius increases, we should pick the top 3 halogens; fluorine, chlorine, bromine.
fluorine, chlorine, bromine
Which element has the largest atoms - beryllium, strontium or radium?
As you go down a group, the elements get bigger as they gain an extra shell of electrons. Therefore, radium has the largest atoms out of the 3 elements provided.
How many electrons are in the outer shell of a chlorine atom?
For groups 1-2 and 3-8 the number of electrons in the outer shell is the same as the group number. Chlorine is in group 7; thus, it has 7 electrons in its outer shell.
What is the name given to the elements in group 7 of the periodic table?
Group 7 of the period table is called halogens.
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