Mass number = protons + neutrons
mass number = 5 + 7
mass number = 12
Https://quizlet.com/18404690/chemistry-final-flash-cards/
here is a Quizlet I have for that
Answer:r=1.2 d=2.4
Explanation:
Radius is half the diameter and the diameter is 2.4 m
Answer:
B. 120 cm
Explanation:
The scale is 1 to 15, so when we are given the value of 8cm all you have to do it multiply 8 by 15 which leaves you with 120.
hope this helps!