stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Science STAAR Review (6, 7 and 8) Flashcards | StudBud
Science STAAR Review (6, 7 and 8)
1 / 32
What is the mass number of a potassium (K) atom that has 20 neutrons?
A
19
B
39
C
18
D
20
Next
0
0
correct · 0:00
