Atomic structure

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Question 8

Medium

This question is about atomic structure.

Define the term mass number of an atom.

[1]

Complete the table below to show the numbers of neutrons and electrons in the species shown.

Species	Number of protons	Number of neutrons	Number of electrons
$86Sr^{86}\text{Sr}$	38
$88Sr2+^{88}\text{Sr}^{2+}$	38

[2]

A sample of strontium contains four isotopes: $84Sr^{84}\text{Sr}$ , $86Sr^{86}\text{Sr}$ , $87Sr^{87}\text{Sr}$ , and $88Sr^{88}\text{Sr}$ . This sample has a relative atomic mass of 87.6. In this sample, the ratio of the abundance of isotopes $84Sr^{84}\text{Sr}$ , $86Sr^{86}\text{Sr}$ , and $87Sr^{87}\text{Sr}$ is $1 : 2 : 2$ .

Calculate the percentage abundance of $86Sr^{86}\text{Sr}$ in this sample.

[3]

Atomic structure

Question 8

Atomic structure Questions

Atomic structure

Question 8

Atomic structure Questions