Question

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an isotope of beryllium contains 4 neutrons. construct the symbol for the isotope.

tap on the parts of the symbol to enter or change the contents.

image with boxes (###) and ei

Explanation:

Step1: Determine atomic number of Be

Beryllium (Be) has atomic number \( Z = 4 \) (number of protons).

Step2: Calculate mass number \( A \)

Mass number \( A=\text{protons}+\text{neutrons}=4 + 4=8 \).

Step3: Construct isotope symbol

Isotope symbol is \( \ce{^A_ZX} \), where \( X \) is element symbol (Be), \( Z = 4 \), \( A = 8 \). So symbol is \( \ce{^8_4Be} \).

Answer:

\(\boldsymbol{\ce{^8_4Be}}\)