Skip to main content
Ch.2 - Atoms, Molecules, and Ions
Chapter 2, Problem 97

Using a suitable reference such as the CRC Handbook of Chemistry and Physics or http://www.webelements.com, look up the following information for nickel: (b) the atomic masses (in u), (c) the natural abundances of the five most abundant isotopes.

Verified step by step guidance
1
Step 1: Understand that isotopes are atoms of the same element with different numbers of neutrons, resulting in different atomic masses.
Step 2: Recognize that the atomic mass of an element is a weighted average of the masses of its isotopes, based on their natural abundances.
Step 3: Use a reliable reference source such as the CRC Handbook of Chemistry and Physics or WebElements to find the atomic masses of nickel's isotopes.
Step 4: Look up the natural abundances of the five most abundant isotopes of nickel in the same reference source.
Step 5: Compile the information gathered: list the isotopes, their atomic masses, and their natural abundances.

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Atomic Mass

Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (u). It reflects both the mass and the relative abundance of each isotope in nature. For nickel, the atomic mass is influenced by its isotopes, which vary in their number of neutrons.
Recommended video:

Isotopes

Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses. For nickel, there are several isotopes, and their natural abundances can vary, affecting the overall atomic mass of the element.
Recommended video:

Natural Abundance

Natural abundance refers to the relative proportions of different isotopes of an element found in nature. It is usually expressed as a percentage and is crucial for calculating the average atomic mass of an element. For nickel, knowing the natural abundances of its isotopes helps in understanding its chemical properties and behavior.
Recommended video:
Guided course
01:26
Nature of Energy
Related Practice
Textbook Question

The element argon has three naturally occurring isotopes, with 18, 20, and 22 neutrons in the nucleus, respectively. (a) Write the full chemical symbols for these three isotopes.

1890
views
Textbook Question

The element chromium (Cr) consists of four naturally occurring isotopes with atomic masses 49.9460, 51.9405, 52.9407, and 53.9389 u. The relative abundances of these four isotopes are 4.3, 83.8, 9.5, and 2.4%, respectively. From these data, calculate the atomic weight of chromium.

1948
views
Textbook Question

Copper (Cu) consists of two naturally occurring isotopes with masses of 62.9296 and 64.9278 u. (a) How many protons and neutrons are in the nucleus of each isotope? Write the complete atomic symbol for each, showing the atomic number and mass number. (b) The average atomic mass of Cu is 63.55 u. Calculate the abundance of each isotope.

2065
views
Textbook Question

There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks: Mass (u) Relative Size 157.836 0.2569 159.834 0.4999 161.832 0.2431 (a) What is the origin of each peak (of what isotopes does each consist)?

548
views
Textbook Question

There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks: Mass (u) Relative Size 157.836 0.2569 159.834 0.4999 161.832 0.2431 (b) What is the mass of each isotope?

2504
views
Textbook Question

There are two different isotopes of bromine atoms. Under normal conditions, elemental bromine consists of Br2 molecules, and the mass of a Br2 molecule is the sum of the masses of the two atoms in the molecule. The mass spectrum of Br2 consists of three peaks: Mass (u) Relative Size 157.836 0.2569 159.834 0.4999 161.832 0.2431 (c) Determine the average molecular mass of a Br2 molecule.

300
views