Question

An element along with its atomic number and mass number is represented as ${}_Z{X^A}$ where $X$ is the symbol of the element, $Z$ is the atomic number and $A$is the mass number Represent elements$A$, $B$, $C$,$D$ and $E$ with its atomic number and mass number from the given data.

Elements	Number of protons	Number of electrons	Number of neutrons
$A$		$x$	$y$
$B$	$a$		$b$
$C$		$m$	$m + 2$
$D$		$t$	$t$
$E$	$n$		$n + 1$

Answer 1

The number of protons and electrons in any element is the same since the element has to be electrically neutral. Mass number of an element is the sum of the number of protons and number of neutrons and it is written as superscript on the element symbol.

Complete step by step answer:
Number of neutrons = atomic mass number - atomic number of protons = number of electronsNumber of protons is equal to the atomic number. So according to formula we can represent
Element $A$is represented as ${}_x{A^{y + x}}$
Atomic number ($Z$) = $x$
Atomic mass ($A$) =$y + x$
As we know number of protons is equal to number of electron so the unknown box in element $A$ is $x$

Element $B$ is represented ${}_a{B^{a + b}}$
Atomic number ($Z$) = $a$
Atomic mass ($A$) =$a + b$
As we know number of protons is equal to number of electron so the unknown box in element $B$ is ${\mathbf{a}}$

Element $C$ is represented ${}_m{C^{2m + 2}}$
Atomic number ($Z$) =$m$
Atomic mass ($A$) =$2m + 2$
As we know number of protons is equal to number of electron so the unknown box in element $C$ is ${\mathbf{m}}$
Element $D$ is represented ${}_t{D^{2t}}$
Atomic number ($Z$) =$t$
Atomic mass ($A$) =$2t$
As we know number of protons is equal to number of electron so the unknown box in element $D$ is ${\mathbf{t}}$
Element $E$ is represented ${}_n{E^{2n + 1}}$
Atomic number ($Z$) =$n$
Atomic mass ($A$) =$2n + 1$
As we know number of protons is equal to number of electron so the unknown box in element is $E$ is ${\mathbf{n}}$

Elements	Number of protons	Number of electrons	Number of neutrons
$A$	$x$	$x$	$y$
$B$	$a$	$a$	$b$
$C$	$m$	$m$	$m + 2$
$D$	$t$	$t$	$t$
$E$	$n$	$n$	$n + 1$

Additional information:
The mass of an atom of an element expressed in mass units. It's approximately like the amount of protons and neutrons within the atom (the mass number) or to the typical number allowing the relative abundances of various
The number of protons within the nucleus of an atom, which is characteristic of a element and determines its place within the table
Protons are charged ,neutrons are uncharged and electrons are charged . The charge of $1$ electron balances the charge of $1$ proton
The negative charge of one electron balances the positive charge of one proton

Note: Isotopes have the same number of electrons, which means they will also have the same number of protons. They only differ in the number of neutrons. Hence, the element can have the same atomic number but different mass number.