using the table, what is the mass number for boron? * (0.5 points)
using the table, what is the mass number for boron? * (0.5 points)
Answer
Explanation:
Step1: Recall mass - number formula
The mass number ($A$) is the sum of protons and neutrons in an atom, $A =$ number of protons+number of neutrons.
Step2: Find number of protons and neutrons for boron
From the table, for boron, the number of protons is not given directly but we know boron has an atomic number of 5 (a known fact from the periodic - table). The number of neutrons for boron in the table is 5.
Step3: Calculate mass number
$A=5 + 5=10$
Answer:
10