Question

Write the complete symbol for the atom with the given atomic number (Z) and atomic mass (A).c). $Z=4,A=9$

Answer 1

Part 1: Representation of an atom

An atom is represented by using the given method

To write a complete symbol, place the mass number at the upper left (superscript) of the chemical symbol and the atomic number at the lower left (subscript). lower left (subscript).

${}_{\mathrm{Z}}{}^{\mathrm{A}}\mathrm{X}$

Where, X = Atomic symbol of the element

A = Mass number of element

Z = Atomic number of element

Part 2: Representation of given element

Given,

Atomic number $\left(Z\right)=4$ and atomic mass $\left(A\right)=9$

• The element with the atomic number $4$ is Beryllium and its symbol is $\mathrm{Be}$
• So the complete symbol for Beryllium is ${}_4{}^{9}Be$