How many protons, neutrons and electrons are in an atom with an atomic number of 11 and a mass number of 23? How did you figure this out? What is the element? (4 points)

Answer 1

To find the number of protons, neutrons, and electrons in an atom with an atomic number of 11 and a mass number of 23, you can follow these steps:

1. Protons: The atomic number of an element represents the number of protons in its nucleus. Therefore, for an atomic number of 11, there are 11 protons.

2. Electrons: In a neutral atom, the number of electrons is equal to the number of protons. Since there are 11 protons, there are also 11 electrons.

3. Neutrons: The mass number of an atom is the total number of protons and neutrons in its nucleus. To find the number of neutrons, you can use the formula: \[ \text{Neutrons} = \text{Mass number} - \text{Atomic number} \] In this case: \[ \text{Neutrons} = 23 - 11 = 12 \] Therefore, there are 12 neutrons.

4. Element: The element with atomic number 11 is sodium (Na).

To summarize:

• Protons: 11
• Neutrons: 12
• Electrons: 11
• Element: Sodium (Na)