Predict which of the following statements are true or false.
2s orbital has one node.

Answer

To determine whether the statement "2s orbital has one node" is true or false, we can follow these steps:

### Step 1: Understand what a node is
A node is a region in an atomic orbital where the probability of finding an electron is zero. This means that at a node, the wave function of the electron is zero.

**Hint:** Remember that nodes indicate areas where electrons cannot be found.

### Step 2: Identify the principal quantum number (n) for the 2s orbital
The principal quantum number (n) indicates the energy level of the electron. For the 2s orbital, n = 2.

**Hint:** The principal quantum number is the first number in the designation of an orbital (e.g., 1s, 2s, 3p).

### Step 3: Use the formula to calculate the total number of nodes
The formula to calculate the total number of nodes in an orbital is given by:
\[ \text{Total number of nodes} = n - 1 \]

For the 2s orbital:
\[ n = 2 \]
\[ \text{Total number of nodes} = 2 - 1 = 1 \]

**Hint:** This formula applies to all orbitals, so you can use it for any principal quantum number.

### Step 4: Conclusion
Since we calculated that the total number of nodes for the 2s orbital is 1, we can conclude that the statement "2s orbital has one node" is true.

**Final Answer:** True