Protons, Neutrons & Electrons

1) How many protons and electrons are present in an iron atom?26

2) How many protons and electrons are present in a cadmium atom?48

3) How many protons and electrons are present in a xenon atom?54

4) How many protons and electrons are present in a barium atom?56

5) How many protons and electrons are present in a chlorine atom?17

6) What is the name of the element that has atoms that contain 2 protons?Helium

7) What is the name of the element that has atoms that contain 39 protons?Yttrium

8) What is the name of the element that has atoms that contain 47 protons?Silver

9) What is the name of the element that has atoms that contain 98 protons?Californium

10) What is the name of the element that has atoms that contain 78 protons?Platinum

11) Write the chemical symbol and charge for the ion with 20 protons and 18 electrons.Ca +2

12) Write the chemical symbol and charge for the ion with 41 protons and 38 electrons.Nb+3

13) Write the chemical symbol and charge for the ion with 8 protons and 10 electrons.O -2

14) Write the chemical symbol and charge for the ion with 42 protons and 36 electrons.Mo +6

15) Write the chemical symbol and charge for the ion with 9 protons and 10 electrons.F -1

16) Write the chemical symbol and charge for the ion with 70 protons and 73 electrons.Yb-3

154

17) How many protons, neutrons and electrons are present in 63Eu+3 ?63 p+, 60 e-, and 91 n0

46

18) How many protons, neutrons and electrons are present in 22Ti+4 ?22 p+, 18 e-, and 24 n0

123

19) How many protons, neutrons and electrons are present in 51Sb-3?51 p+, 54 e-, and 72 n0

65

20) How many protons, neutrons and electrons are present in 29Cu+1?29 p+, 28 e-, and 36 n0

263

21) How many protons, neutrons and electrons are present in 106Sg+2?106 p+, 104 e-, and 157 n0

17

22) How many protons, neutrons and electrons are present in 8O-2?8 p+, 10 e-, and 9 n0

183

23) How many protons, neutrons and electrons are present in 74W+5?74 p+, 69 e-, and 109 n0

233
24) Write the complete chemical symbol for the ion with 90 protons, 143 neutrons and 88 electrons?90 Th+2

108
25) Write the complete chemical symbol for the ion with 62 neutrons, 42 electrons and 46 protons.46 Pd+4

80

26) Write the complete chemical symbol for the ion with 36 electrons, 45 neutrons and 35 protons.35 Br-1

40

27) Write the complete chemical symbol for the ion with 19 protons, 18 electrons and 21 neutrons.19 K+1

3

28) Write the complete chemical symbol for the ion with 1 proton, 2 neutrons and 0 electrons.1 H+1

129

29) Write the complete chemical symbol for the ion with 40 protons, 37 electrons and 52 neutrons.40 Zr +3

79

30) Write the complete chemical symbol for the ion with 36 electrons, 34 protons and 45 neutrons.34 Se -2

Protons, Neutrons, and Electrons Practice Worksheet

Atomic
symbol / Atomic
number / Protons / Neutrons / Electrons / Atomic
mass
B / 5 / 5 / 6 / 5 / 11
Na / 11 / 11 / 13 / 11 / 24
Ga / 31 / 31 / 37 / 31 / 68
Y / 39 / 39 / 50 / 39 / 89
Cu / 29 / 29 / 35 / 29 / 64
Tc / 43 / 43 / 57 / 43 / 100
Pb / 82 / 82 / 125 / 82 / 207
Yb / 70 / 70 / 102 / 70 / 172
Ac / 89 / 89 / 136 / 89 / 225
Mo / 42 / 42 / 53 / 42 / 95
Tl / 81 / 81 / 125 / 81 / 206
Fm / 100 / 100 / 159 / 100 / 259
No / 102 / 102 / 159 / 102 / 261
Yb / 70 / 70 / 102 / 70 / 172
Sg / 106 / 106 / 159 / 106 / 265