what is the mass number of a carbon isotope that has seven neutrons?\na 13\nb 11\nc 7\nd 9
what is the mass number of a carbon isotope that has seven neutrons?\na 13\nb 11\nc 7\nd 9
Answer
Explanation:
Step1: Recall carbon's proton number
Carbon has 6 protons.
Step2: Use mass - number formula
Mass number = number of protons+number of neutrons. Given 6 protons and 7 neutrons, mass number = 6 + 7.
Step3: Calculate the mass number
6+7 = 13.
Answer:
A. 13