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Oxford University Press - Online Resource Centres

Crowe & Bradshaw: Chemistry for the Biosciences 3e

Chapter 2: Multiple choice questions

Instructions

Answer the following questions and then press 'Submit' to get your score.

Question 1

An atom of sodium has an atomic number of 11 and a mass number of 23. Which of the following statements is correct?

Question 2

An atom of phosphorus has an atomic number of 15 and a mass number of 31. How many neutrons does it contain?

Question 3

What is the chemical symbol for magnesium?

Question 4

Complete the following sentence: 'Different isotopes of the same element have...'

Question 5

Shell three contains how many sub-shells?

Question 6

The 3d subshell can hold a maximum of how many electrons?

Question 7

Calcium has an atomic number of 20. What is its electronic configuration?

Question 8

Which of the following places the atomic subshells in the correct order of relative energy, starting with the subshell of lowest energy?

Question 9

There are how many naturally-occurring isotopes of oxygen?

Question 10

The mass of a single atom of a particular isotope is called which of the following?

Question 11

The identity of a chemical element is determined by which of the following?