Mass Number, Atomic Number + Standard Atomic Notation Flashcards
1
Q
What is the fundamental difference between atoms of different elements?
A
It lies in the number of protons in the nucleus; like the “fingerprint” of an element.
2
Q
What is Atomic Number? State symbol too.
A
(Z)-The number of protons in the nucleus of an atom.
3
Q
What is Mass Number? State the symbol too
A
(A) - The sum of the protons and neutrons in the nucleus of an atom.
4
Q
What is the format for writing elements in standard atomic notation.
A
Mass Number (A) - Top left
Element Symbol in the middle
Atomic Number (Z) - Bottom left
5
Q
What does the number of neutrons equal?
A
A-Z
6
Q
What does the number of electrons equal?
A
The number of protons in a neutral atom.
7
Q
Write the following elements in standard atomic notation (Calcium and Fluorine)
A
Calcium: 40 Ca 20
Fluorine: 19 F 9
