Q. What is the atomic number of Na?

Q: What is the atomic number of \text{Na} ?

Sodium, \text{Na} , has atomic number 11.

Q: How can I find the atomic number of \text{Na} from the periodic table?

Locate sodium ( \text{Na} ) on the periodic table. The number at the top of the element box is the atomic number: 11.

Q: Does \text{Na} have the same number of electrons as its atomic number?

For neutral sodium, electrons equal protons, so 11 electrons. For \text{Na}^+ , it has 10 electrons.

Q: What is the atomic number of \text{Na} compared to \text{Mg} ?

\text{Mg} has atomic number 12, while \text{Na} has 11. Sodium is one less.

Answer

The atomic number of sodium (Na) is the number of protons in its nucleus. For sodium, that number is \(11\).

Final result: \(11\)

Detailed Explanation

The symbol Na stands for the element sodium in the periodic table.

Step 1: Identify the element

The atomic number is a property of the element itself, determined by its position in the periodic table. Since Na is sodium, we use sodium’s atomic number.

Step 2: Recall the atomic number of sodium

On the periodic table, sodium has atomic number:

\[
\text{Atomic number of Na} = 11
\]

Answer

The atomic number of Na is 11.

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General Chemistry FAQs

What is the atomic number of \( \text{Na} \)?

Sodium, \( \text{Na} \), has atomic number \(11\).

What does the atomic number mean for \( \text{Na} \)?

The atomic number equals the number of protons in the nucleus. For \( \text{Na} \), that is \(11\) protons.

How can I find the atomic number of \( \text{Na} \) from the periodic table?

Locate sodium (\( \text{Na} \)) on the periodic table. The number at the top of the element box is the atomic number: \(11\).

Does \( \text{Na} \) have the same number of electrons as its atomic number?

For neutral sodium, electrons equal protons, so \(11\) electrons. For \( \text{Na}^+ \), it has \(10\) electrons.

What is the atomic number of \( \text{Na} \) compared to \( \text{Mg} \)?

\( \text{Mg} \) has atomic number \(12\), while \( \text{Na} \) has \(11\). Sodium is one less.

If \( \text{Na} \) forms \( \text{Na}^+ \), what happens to its atomic number?

The atomic number stays the same because it depends on protons only. \( \text{Na}^+ \) still has atomic number \(11\).

Solve: sodium’s atomic number (Na).
It is 11.

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