ATI TEAS Practice Test 11

10 free ATI TEAS practice questions in the real exam format, covering the official content areas, with an explanation for every answer.

ATI TEAS Practice Test 11Tutor mode

Question 1 of 10

Science

Excerpt from the periodic table
Period	Group 1	Group 2	Group 15	Group 16	Group 17
2	Li (3) 6.94	Be (4) 9.01	N (7) 14.01	O (8) 16.00	F (9) 19.00
3	Na (11) 22.99	Mg (12) 24.31	P (15) 30.97	S (16) 32.06	Cl (17) 35.45
4	K (19) 39.10	Ca (20) 40.08	As (33) 74.92	Se (34) 78.97	Br (35) 79.90

Each cell shows the element symbol, the atomic number in parentheses and the average atomic mass in amu.

Phosphorus-31 is the most common isotope of phosphorus. Using the periodic table excerpt, how many neutrons are in one atom of phosphorus-31?