5

Question

B
Boron
10.81

Atomic number
atomic mass
# of protons
# of neutrons
# of electrons

Answer 1

To calculate the atomic properties of Boron (B) based on the information you provided, we can fill in the details as follows:

• Atomic number: 5 (This is the number of protons in the nucleus of an atom of Boron.)

• Atomic mass: 10.81 (This is the average mass of an atom of Boron, accounting for the natural isotopic distribution.)

• Number of protons: 5 (This is equal to the atomic number.)

• Number of neutrons:

  • To calculate the number of neutrons, we can use the formula: \[ \text{Number of neutrons} = \text{Atomic mass} - \text{Number of protons} \] Given that the atomic mass is approximately 10.81 and there are 5 protons: \[ \text{Number of neutrons} \approx 10.81 - 5 = 5.81 \text{ (round to the nearest integer, which is 6)} \]
  • So, the number of neutrons is approximately 6.

• Number of electrons: 5 (In a neutral atom, the number of electrons equals the number of protons.)

Here’s the summary:

• Atomic number: 5
• Atomic mass: 10.81
• Number of protons: 5
• Number of neutrons: 6
• Number of electrons: 5