Ions C1 Flashcards
1
Q
How many protons, electrons and neutrons are in sodium? Give its electronic configuration.
23 Na
A
11 protons, 11 electrons and (23 –11) = 12 neutrons.
2
Q
What determines the way in which an element reacts?
A
The number of electrons in the outermost shell.
3
Q
What is an isotope?
A
Atoms of the same element with different numbers of neutrons.
4
Q
How do atoms form negative ions?
A
. By gaining electrons
5
Q
How do atoms form positive ions?
A
By losing electrons
