Paper 1 · June 2024 · Atomic Structure and Bonding
An ion of an element X is represented as follows, with W above and to the left of the symbol, Y above and to the right, and Z below and to the left.
Which statement about X is true?
AY is the nucleon number.
BZ is the atomic number.
CW is the proton number.
DW is the charge on the ion.
Explanation
In the standard notation the nucleon number is written at the top left, the atomic (proton) number at the bottom left, and the charge at the top right. So W is the nucleon number, Z is the atomic number, and Y is the charge. Only B states one of these correctly.
ZIMSEC Chemistry 4024/1, June 2024, Q2