The periodic table Flashcards
1
Q
what are groups?
A
vertical columns
2
Q
elements in a column
A
have similar properties
3
Q
all of the elements in a group
A
have the same number of electrons in their outer shell
4
Q
what are the properties that all group 1 metals have?
A
all metals, all react with water to form an alkaline solution and hydrogen gas, all react with oxygen to form an oxide
5
Q
What is the name of group 0?
A
noble gases
6
Q
how many electrons do the noble gases have in their outer shell? and what does this mean?
A
8 (apart from helium=2) They are all stable and unreactive
7
Q
what is the top number?
A
the mass number- total number of protons and neutrons
8
Q
what is the bottom number?
A
the atomic number- total number of protons (also electrons)
