The Building Blocks of Matter Atoms and Their Properties

The video tutorial introduces the concept of matter, defining it as anything with mass and volume, and categorizes it into solids, liquids, gases, and plasma. It explains that matter is composed of atoms, which consist of protons, neutrons, and electrons. The tutorial discusses the structure of atoms and how they form elements, which are organized in the periodic table. It provides examples of elements and explains how to determine the number of protons, electrons, and neutrons in an atom using the periodic table. The concept of isotopes is also introduced, highlighting variations in neutron numbers within the same element.

Which of the following is NOT considered matter?

• Gold

• Water

• Air

• Heat

What are the tiny particles that make up matter called?

• Molecules

• Compounds

• Atoms

• Cells

Which subatomic particle is positively charged?

• Photon

• Proton

• Neutron

• Electron

What is the central part of an atom called?

• Electron cloud

• Neutron core

• Proton center

• Nucleus

Which element is a liquid at room temperature?

• Gold

• Mercury

• Carbon

• Helium

What does the atomic number of an element represent?

• Number of neutrons

• Number of electrons

• Number of atoms

• Number of protons

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

• Subtract atomic number from atomic mass

• Add atomic number to atomic mass

• Multiply atomic number by atomic mass

• Divide atomic mass by atomic number

What is an isotope?

• An atom with a different number of neutrons

• An atom with a different number of electrons

• An atom with a different number of atoms

• An atom with a different number of protons

Which of the following is an example of an isotope?

• Carbon-12 and Carbon-14

• Oxygen-16 and Oxygen-18

• Hydrogen-1 and Hydrogen-2

• All of the above

What remains unchanged in isotopes of the same element?

• Number of protons

• Atomic mass

• Number of atoms

• Number of neutrons