Exploring Atomic Structure and the Periodic Table

The video tutorial explores the differences between substances by examining atomic structure. It explains subatomic particles like protons, neutrons, and electrons, and their roles in defining atomic number and mass. The concept of isotopes and average atomic mass is discussed, followed by an overview of the periodic table's organization. The video also covers the properties of metals, nonmetals, and metalloids, encouraging viewers to explore the periodic table for more insights.

What makes one substance different from another?

• The size of the substance

• The temperature at which they are found

• The types of atoms that make them up

• The color of the substance

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NGSS.MS-PS1-1

Which subatomic particle is positively charged?

• Neutron

• Photon

• Electron

• Proton

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NGSS.MS-PS2-3

What is the atomic number of an element?

• The number of protons

• The number of neutrons

• The combined number of protons and neutrons

• The number of electrons

What are isotopes?

• Atoms with the same number of neutrons but different numbers of protons

• Atoms with the same number of protons but different numbers of neutrons

• Atoms with the same number of protons and neutrons

• Atoms with the same number of electrons but different numbers of protons

What is the modern periodic table based on?

• Number of neutrons

• Atomic mass

• Number of electrons

• Atomic number

What is the chemical symbol for oxygen?

• O

• Ox

• Og

• O2

Which family of elements is highly reactive and includes magnesium?

• Noble gases

• Alkaline earth metals

• Halogens

• Transition metals

What are the properties of nonmetals?

• Good conductors of electricity

• High density

• Dull and brittle

• Shiny and malleable

What are metalloids?

• Elements with properties of both metals and nonmetals

• Elements that are gases at room temperature

• Elements that are highly reactive

• Elements that are good conductors of electricity

Which element is used in computers due to its semiconductor properties?

• Tungsten

• Copper

• Iron

• Silicon