Understanding Ions and Atomic Structure

This video tutorial explains how to solve an ALEKS problem involving counting protons and electrons in atoms and atomic ions. It covers the classification of atoms, cations, and anions, and provides examples using sulfur, indium, and boron to illustrate how to determine the number of protons and electrons, identify the element symbol, and calculate the charge of ions.

What are the three types of entities you might encounter in this problem?

• Atoms, cations, and anions

• Molecules, ions, and atoms

• Protons, neutrons, and electrons

• Elements, compounds, and mixtures

How do you classify an ion as a cation?

• It has more neutrons than protons

• It has more electrons than protons

• It has more protons than electrons

• It has an equal number of protons and electrons

What determines the symbol of an atom or ion?

• The charge of the ion

• The atomic mass

• The number of protons

• The number of electrons

In the example of sulfur, what is the charge of the ion if it has 16 protons and 18 electrons?

• 2-

• 1-

• 2+

• 1+

What is the symbol for an element with 49 protons?

• In

• Sn

• Sb

• I

What does it mean for an atom to be neutral?

• It has an equal number of protons and electrons

• It has no protons

• It has more electrons than protons

• It has more protons than electrons

In the example of boron, what is the charge of the ion if it has 5 protons and 2 electrons?

• 2-

• 3-

• 2+

• 3+

How many electrons does a B3+ ion have?

• 4

• 3

• 5

• 2

What does a positive charge on an ion indicate?

• More protons than electrons

• Equal number of protons and electrons

• More electrons than protons

• More neutrons than protons

What is the significance of the number '3' in a B3+ ion?

• It indicates the atomic mass

• It indicates the number of electrons

• It indicates the number of protons

• It indicates the difference between protons and electrons