| Name of Element | Element Symbol | Mass Number | Atomic Number | Protons | Neutrons | Electrons |

Question

|------------------|----------------|-------------|---------------|---------|----------|-----------|
| ____ | Mg | __ | __ | 12 | __ | 12 |

Answer 1

To complete the table for magnesium (Mg):

• Element Symbol: Mg
• Mass Number: The mass number is the total number of protons and neutrons. Magnesium typically has 12 protons (as indicated) and usually has 12 neutrons (specifically, the most common isotope . so 12 + 12 = 24.)
• Atomic Number: The atomic number is equal to the number of protons, which is 12 for magnesium.
• Neutrons: For the most common isotope of magnesium (Mg-24), there are 12 neutrons.

So, the completed table is:

| Name of Element | Element Symbol | Mass Number | Atomic Number | Protons | Neutrons | Electrons | |------------------|----------------|-------------|---------------|---------|----------|-----------| | Magnesium | Mg | 24 | 12 | 12 | 12 | 12 |