Question

Complete the following chart for each element given.
ELEMENT


# OF PROTONS
# OF NEUTRONS
# OF ELECTRONS
Arsenic , As








Boron, B








Platinum, Pt








Gold, Au








Neon, Ne

Answer 1

To complete the chart for each element, we will identify the number of protons, neutrons, and electrons based on the atomic number and common isotopes. Here’s the information:

### Arsenic (As)
- **# of Protons:** 33 (Atomic Number)
- **# of Neutrons:** 42 (most common isotope, As-75, has 75-33 = 42)
- **# of Electrons:** 33 (neutral atom)

### Boron (B)
- **# of Protons:** 5 (Atomic Number)
- **# of Neutrons:** 6 (most common isotope, B-11, has 11-5 = 6)
- **# of Electrons:** 5 (neutral atom)

### Platinum (Pt)
- **# of Protons:** 78 (Atomic Number)
- **# of Neutrons:** 117 (most common isotope, Pt-195, has 195-78 = 117)
- **# of Electrons:** 78 (neutral atom)

### Gold (Au)
- **# of Protons:** 79 (Atomic Number)
- **# of Neutrons:** 118 (most common isotope, Au-197, has 197-79 = 118)
- **# of Electrons:** 79 (neutral atom)

### Neon (Ne)
- **# of Protons:** 10 (Atomic Number)
- **# of Neutrons:** 10 (most common isotope, Ne-20, has 20-10 = 10)
- **# of Electrons:** 10 (neutral atom)

Here’s the completed chart:

| Element | # of Protons | # of Neutrons | # of Electrons |
|----------|--------------|----------------|-----------------|
| Arsenic | 33 | 42 | 33 |
| Boron | 5 | 6 | 5 |
| Platinum | 78 | 117 | 78 |
| Gold | 79 | 118 | 79 |
| Neon | 10 | 10 | 10 |