element notation Flashcards
1
Q
What is atomic number (Z)
A
The number of protons in a given atom of an element
In a neutral atom it is also equal to the number of Electrons
2
Q
What is mass number (A)
A
The Total number of protons and neutrons
Nmber of nutrons = (A) - (z)
3
Q
What does X represent
A
The symbol of the element
4
Q
How do u differentiate between the atomic number and mass number
A
The smallest number represents the atomic number
The biggest number represents the mass number
5
Q
What is an ion
A
It is an atom with excess or difiecency of elecrons
6
Q
What do u call an
+ve ion
-ve ion
A
+ve ion - cations
-ve ion- anions
