Question
3 An atom of potassium has the symbol (}_{19)^39K What is the atomic number of potassium? Tick one box. 19 square 20 square 39 square 58 square
Answer
4.2
(178 Votes)
Jude
Advanced · Tutor for 1 years
Answer
The atomic number of potassium is 19
.
Explanation
## Step 1:The atomic number of an element is determined by the number of protons it has in its nucleus. This information can be easily found on the periodic table. Each element in the table has a specific atomic number.## Step 2:For Potassium, which is represented by the symbol
, the atomic number is given in the notation
. The subscript (lower number) represents the atomic number.## Step 3:Therefore, the atomic number of potassium is 19.#