Question

subatomic particles
complete the table below by counting the number
of subatomic particles for the 5 listed elements.
once you complete the table use the information
to help you answer the questions below.

element | # of protons | # of electrons | # of neutrons | total # of particles
c | 6 | 6 | 6 | 18
k | 19 | 19 | 20 | 58
fe | 26 | 26 | 30 | 82
ba | 56 | 56 | 81 | 193
se | 34 | 34 | 45 | 113

1. how many more protons does an atom of potassium, k,

have than an atom of carbon, c?

1. what is the difference between the number of

electrons in an atom of barium, ba, and the number of
electrons in an atom of iron, fe?

1. what is the atomic mass of the element selenium, se?

Explanation:

Step1: Find protons of K and C

Protons of K = 19, Protons of C = 6

Step2: Calculate difference for Q1

$19 - 6 = 13$

Step3: Find electrons of Ba and Fe

Electrons of Ba = 56, Electrons of Fe = 26

Step4: Calculate difference for Q2

$56 - 26 = 30$

Step5: Calculate atomic mass for Q3

Atomic mass = protons + neutrons; Protons of Se = 34, Neutrons of Se = 45
$34 + 45 = 79$

Answer:

1. 13
2. 30
3. 79