Unraveling Atoms and Elements Through the Periodic Table

Mr. Anderson explains the structure of atoms, focusing on protons, neutrons, and electrons. He discusses how the periodic table is organized by atomic numbers and the significance of energy levels in electron configuration. The video also covers the concept of chemical bonds and how elements are grouped in the periodic table based on their valence electrons, highlighting the properties of noble gases, alkali metals, and halogens.

What are the three main subatomic particles discussed in the introduction?

• Atoms, Molecules, Compounds

• Protons, Neutrons, Electrons

• Metals, Nonmetals, Metalloids

• Ions, Isotopes, Elements

What does the atomic number of an element indicate?

• The atomic mass

• The number of neutrons

• The number of electrons in the outer shell

• The number of protons

How is the mass number of an element calculated?

• By adding the number of protons and electrons

• By multiplying the number of protons and neutrons

• By subtracting the number of electrons from protons

• By adding the number of protons and neutrons

In the Bohr model, how many electrons can the first energy level hold?

• 18

• 10

• 8

• 2

Why is neon considered a 'happy' atom in terms of its electron configuration?

• It has an equal number of protons and neutrons

• It can easily gain electrons

• It has more protons than electrons

• It has a full outer energy level

What is the atomic number of nitrogen?

• 8

• 7

• 6

• 5

How many electrons does nitrogen need to gain to fill its outer energy level?

• 3

• 2

• 4

• 1

What is the chemical formula for ammonia?

• NH2

• NH3

• NH4

• N2H4

What do elements in the same column of the periodic table have in common?

• Same atomic number

• Same number of protons

• Same number of valence electrons

• Same atomic mass

Why are noble gases considered stable?

• They have more protons than electrons

• They can easily lose electrons

• They have an equal number of protons and neutrons

• They have a full outer energy level