The periodic table Flashcards
1
Q
What does the group number tell us?
A
The number of electrons on the outer shell.
1
Q
Sodium is in group one.
How many electrons are in the outer shell.
A
one
2
Q
Why is group 0 (Noble Gases) unreactive?
A
Because they have a full outer shell, so they don’t have to lose or gain any electrons.
3
Q
Why are metals found on the left of the periodic table?
A
Because they don’t have many electrons in there outer shell.
4
Q
What is an ion?
A
An atom that has lost or gained electrons.
5
Q
Do metals form positive or negative ions?
A
Positive
6
Q
What is an isotope?
A
An isotope is an atom of the same element with different numbers of neutrons.
7
Q
How is the modern periodic table arranged?
A
In order of atomic number.(proton)
8
Q
Who arranged the elements in order of increasing atomic weight?
A
John Newlands
