Introduction to Atoms: The Building Blocks of Life

The video tutorial explains that cells are the building blocks of life, composed of atoms, which are the fundamental units of matter. Atoms consist of subatomic particles: protons, neutrons, and electrons. The nucleus, containing protons and neutrons, holds most of an atom's mass, while electrons orbit the nucleus. The video also compares the atomic structures of gold and lead, highlighting differences in their subatomic particles, which result in distinct chemical properties.

What are the fundamental building blocks of cells?

• Molecules

• Organs

• Atoms

• Tissues

Which subatomic particle is positively charged?

• Electron

• Neutron

• Proton

• Photon

Where is the majority of an atom's mass located?

• In the electrons

• In the nucleus

• In the orbitals

• In the protons

How many protons does a gold atom have?

• 82

• 79

• 118

• 125

What makes gold different from lead at the atomic level?

• Same number of neutrons but different electrons

• Different number of electrons only

• Different number of protons, neutrons, and electrons

• Same number of protons but different neutrons