Question

scandium has a single natural isotope. use the information from the periodic table to fill in the information about an atom of scandium. scandium 44.956 atomic mass number of protons number of electrons number of neutrons

Explanation:

Step1: Determine atomic mass

The atomic mass is directly given on the periodic table as \(44.956\).

Step2: Find number of protons

The atomic number (number of protons) is given as \(21\) (the number above the element symbol).

Step3: Calculate number of electrons

For a neutral atom, the number of electrons equals the number of protons. So, it is \(21\).

Step4: Calculate number of neutrons

Use the formula \( \text{Number of neutrons}=\text{Atomic mass (approximate)}-\text{Number of protons}\). Approximating atomic mass to \(45\), then \(45 - 21=24\).

Answer:

Atomic mass: \(44.956\)
Number of protons: \(21\)
Number of electrons: \(21\)
Number of neutrons: \(24\)