| Atomic symbol | Atomic Number | Protons | Neutrons | Electrons | Atomic mass |

Question

|---------------|---------------|---------|----------|-----------|-------------|
| __ | 100 | __ | 159 | __ | __ |

Answer 1

Let's break down the information provided in your table. You have an atomic number of 100 and 159 neutrons.

1. Protons: The number of protons in an element is equal to its atomic number. Therefore, for atomic number 100, there are 100 protons.
2. Electrons: In a neutral atom, the number of electrons is equal to the number of protons. So there are also 100 electrons.
3. Atomic Mass: The atomic mass can be estimated by adding the number of protons and neutrons together. In this case, it would be:
   • Atomic Mass = Protons + Neutrons = 100 + 159 = 259.

From this analysis, we can complete the table for the element with atomic number 100, which is Dubnium (Db):

| Atomic symbol | Atomic Number | Protons | Neutrons | Electrons | Atomic mass | |---------------|---------------|---------|----------|-----------|-------------| | Db | 100 | 100 | 159 | 100 | 259 |