Understanding Ions and Atomic Charges

This video tutorial by Mr. Post introduces the concept of ions, explaining how atoms can become charged particles through the gain or loss of electrons. It covers the basics of neutral atoms, cations, and anions, and provides math practice for calculating atomic charges. The tutorial also teaches how to express atomic information using complete chemical symbols, including atomic number, mass number, and charge.

What is the primary focus of the video tutorial?

• Exploring molecular structures

• Studying the periodic table

• Learning about ions and atomic charges

• Understanding chemical reactions

What happens to an atom when an electron leaves its electron cloud?

• It gains a neutron

• It becomes positively charged

• It remains neutral

• It becomes negatively charged

What is an ion?

• A stable isotope

• A molecule with multiple atoms

• An atom with a charge

• A neutral atom

How can you remember that a cation is a positive ion?

• Cation sounds like 'cat'

• Cation is a plus sign

• Cation is a minus sign

• Cation is neutral

What is the charge of an atom with three protons and two electrons?

• Neutral

• 2+

• 1-

• 1+

What is the result of a -3 charge combined with a +2 charge?

• Neutral

• 1-

• 2-

• 1+

In a complete chemical symbol, where is the mass number located?

• Next to the element symbol

• Below the atomic number

• Next to the charge

• Above the atomic number

What is the chemical symbol for an atom with 7 protons, 8 neutrons, and 10 electrons?

• 15/7 N 3+

• 7/15 N 3+

• 15/7 N 3-

• 7/15 N 3-

How many more electrons than protons does an atom with a 3- charge have?

• Three more

• Four more

• Two more

• One more

What is the charge of an atom with 12 protons and 10 electrons?

• Neutral

• 1+

• 2+

• 2-