Atomic Structure and Chemical Stability Explained

This video provides a basic overview of atomic structure, explaining that atoms are the fundamental units of chemical elements. It describes the subatomic particles: protons, neutrons, and electrons, and their charges. The video discusses atomic models, focusing on electron shells and energy levels, and explains the concept of chemical stability and reactivity, highlighting the octet rule and exceptions like hydrogen and helium. The video concludes with a summary of these concepts.

What are the basic units of chemical elements?

• Ions

• Atoms

• Molecules

• Compounds

Which subatomic particle has a positive charge?

• Neutron

• Electron

• Photon

• Proton

Why are atoms considered electrically neutral?

• They have more protons than electrons.

• They have equal numbers of protons and electrons.

• They have no charged particles.

• They have more electrons than protons.

In a carbon atom, how many electrons are typically found in the outermost shell?

• 6

• 8

• 4

• 2

What is the maximum number of electrons that can be held in the first energy level or shell?

• 8

• 4

• 2

• 6

Why is helium considered stable?

• It has 8 electrons in its outer shell.

• It has no electrons.

• It has 6 electrons in its outer shell.

• It has 2 electrons in its only shell.

What makes hydrogen chemically reactive?

• It has no electrons.

• It has one electron in its only shell.

• It has 8 electrons in its outer shell.

• It has a full outer shell.

How many electrons are needed in the outermost shell for stability in atoms with more than one energy level?

• 8

• 6

• 4

• 2

Which element is stable due to having 8 electrons in its outermost shell?

• Carbon

• Hydrogen

• Neon

• Oxygen

What is the term for atoms trying to achieve stability by sharing, gaining, or losing electrons?

• Electron affinity

• Octet rule

• Ionization

• Duet rule