In the next set of boxes, enter the mass number and atomic number of the alpha particle, which has the same composition as the nucleus of a helium (He) atom. After filling in the
boxes in the Gizmo, what is the atomic mass of the first element?
New mass number
238
U
+
92
New atomic number

234

Explanation:

From the question given above, the following data were obtained:

Alpha particle => ⁴₂He

²³⁸₉₂U —> ? + ⁴₂He

Let the unknown be ⁿₓZ. Thus, the equation becomes

²³⁸₉₂U —> ⁿₓZ + ⁴₂He

Next, we shall determine x, y and Z. This can be obtained as follow:

92 = x + 2

Collect like terms

92 – 2 = x

90 = x

x = 90

238 = n + 4

Collect like terms

238 – 4 = n

234 = n

n = 234

ⁿₓZ => ²³⁴₉₀Z => ²³⁴₉₀Th

Thus the balanced equation

²³⁸₉₂U —> ²³⁴₉₀Th + ⁴₂He

Therefore, the atomic mass of the first element is 234

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

if you're asking what comes out, it's steam.