Question

protons: ● neutrons: ● electrons: ●●
2
0
h
1
hydrogen (with atomic model and element box)

Explanation:

To analyze the given atomic model and element card for Hydrogen:

Step 1: Identify Protons, Neutrons, Electrons

• Protons: The red sphere in the nucleus. From the element card, the atomic number (bottom left, red) is 1, so protons = 1.
• Neutrons: The gray sphere in the nucleus. From the element card, the mass number (top left) is 2. Mass number = protons + neutrons, so neutrons = \( 2 - 1 = 1 \).
• Electrons: The blue spheres in orbitals. From the diagram, there are 2 electrons.

Step 2: Analyze Electron Configuration

Hydrogen (atomic number 1) normally has 1 electron (1s¹). Here, it has 2 electrons, indicating it is a hydride ion (\( \text{H}^- \)) (gained 1 electron, so charge \( -1 \)).

Step 3: Verify Isotope

The mass number is 2 (protons + neutrons = 2), so this is deuterium (an isotope of hydrogen with 1 proton, 1 neutron, and here, 2 electrons as \( \text{D}^- \) or \( \text{H}^- \) with mass 2).

Answer:

This represents a hydride ion (\( \text{H}^- \)) of the deuterium isotope (mass number 2) of hydrogen, with 1 proton, 1 neutron, and 2 electrons.