Understanding Atomic Structure and Bonding

The video provides a review of grade 10 chemistry, focusing on the periodic table, atomic structure, and diagrams. It explains atomic numbers and masses, Bohr-Rutherford diagrams, and the significance of carbon. The video also introduces Lewis Dot diagrams and the formation of methane through electron sharing.

What is the primary purpose of the periodic table?

• To show the history of chemistry

• To organize elements based on their properties

• To list all known compounds

• To display chemical reactions

What does the atomic number of an element represent?

• The atomic mass

• The number of protons in the nucleus

• The total number of electrons

• The total number of neutrons

How can you calculate the number of neutrons in an atom?

• By subtracting the atomic number from the atomic mass

• By multiplying the atomic number by the atomic mass

• By dividing the atomic mass by the atomic number

• By adding the atomic number and atomic mass

In a Bohr-Rutherford diagram, how many electrons can the first shell hold?

• Eight

• Six

• Four

• Two

What is the maximum number of electrons the second shell can accommodate in a Bohr-Rutherford diagram?

• Eight

• Six

• Four

• Two

Why does carbon seek to have eight electrons in its outer shell?

• To form more compounds

• To increase its atomic mass

• To become a noble gas

• To become an ion

What is the significance of the outer shell electrons in chemical bonding?

• They are involved in forming bonds

• They determine the atomic mass

• They determine the atomic number

• They are not important

What is a Lewis Dot diagram used for?

• To determine the number of protons

• To calculate atomic mass

• To display only the valence electrons

• To show the full electron configuration

How does carbon achieve a stable electron configuration in methane?

• By sharing electrons with hydrogen

• By gaining electrons

• By becoming an ion

• By losing electrons

What is the chemical formula for methane?

• C3H8

• CH3

• CH4

• C2H6