Exploring the Basics of Atoms

This video tutorial covers the basics of chemistry, focusing on atoms, elements, and compounds. It explains the structure of atoms, including protons, neutrons, and electrons, and how these subatomic particles determine the properties of elements. The tutorial also discusses electron shells, atomic numbers, and mass numbers, providing insights into isotopes and their applications. Finally, it introduces ions and their role in chemical bonding.

What is the smallest unit of matter that retains the properties of an element?

• Proton

• Atom

• Molecule

• Compound

Which subatomic particle is positively charged?

• Electron

• Isotope

• Proton

• Neutron

How many electrons can the first shell of an atom hold?

• Six

• Four

• Eight

• Two

What is the maximum number of electrons in the second shell of an atom?

• Ten

• Eight

• Six

• Two

What does the atomic number of an element represent?

• Mass number

• Number of protons

• Number of electrons in a neutral atom

• Number of neutrons

What is an isotope?

• Atom with different number of protons

• Atom with different number of electrons

• Atom with different mass number

• Atom with different number of neutrons

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

• Subtract atomic number from mass number

• Add protons and electrons

• Add atomic number to mass number

• Subtract electrons from protons

What is the charge of an ion with more electrons than protons?

• Variable

• Positive

• Neutral

• Negative

What type of bond involves atoms that have lost or gained electrons?

• Covalent bond

• Hydrogen bond

• Ionic bond

• Metallic bond

Which application uses radioactive isotopes?

• To age fossils

• To clean water

• To improve weather predictions

• To increase plant growth