use the periodic table to answer the question. write the atomic symbol (including the atomic number) for the…

use the periodic table to answer the question. write the atomic symbol (including the atomic number) for the isotope of neodymium with 90 neutrons. • write the answer in the form $_z^a x$ using the atomic symbol button in the toolbar, where $a$ is the mass number, $z$ is the atomic number, and $x$ is the chemical symbol for the unknown element.

use the periodic table to answer the question. write the atomic symbol (including the atomic number) for the isotope of neodymium with 90 neutrons. • write the answer in the form $_z^a x$ using the atomic symbol button in the toolbar, where $a$ is the mass number, $z$ is the atomic number, and $x$ is the chemical symbol for the unknown element.

Answer

Answer:

$_{60}^{150}\text{Nd}$

Explanation:

Step1: Find atomic number of neodymium

From periodic table, atomic number of neodymium ($\text{Nd}$) is $Z = 60$.

Step2: Calculate mass number

Mass number $A$ is sum of protons and neutrons. Protons equal atomic number. Given 90 neutrons, $A=60 + 90=150$.

Step3: Write atomic symbol

Atomic symbol is written as ${Z}^{A}\text{X}$, so for neodymium it is ${60}^{150}\text{Nd}$.