Exploring Rational Expressions in Physical Science

This video is a review of physical science concepts, focusing on the structure of the atom, isotopes, atomic numbers, and atomic mass. It explains chemical bonding, including ionic and covalent bonds, and discusses radioactivity, nuclear fission, and fusion. The video aims to reinforce foundational chemistry knowledge and prepare students for more advanced topics.

Which subatomic particle has a positive charge?

• Electron

• Neutron

• Proton

• Photon

What do we call atoms of the same element with different numbers of neutrons?

• Ions

• Isotopes

• Molecules

• Compounds

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

• By looking at the atomic number

• By measuring the charge

• By looking at the atomic mass

• By counting the electrons

What information is found at the top of an element block on the periodic table?

• Atomic mass

• Electron configuration

• Atomic number

• Chemical symbol

What is the difference between a molecule and a compound?

• A compound contains at least two different kinds of atoms, while a molecule does not

• A molecule contains at least two different kinds of atoms, while a compound does not

• A molecule is always larger than a compound

• A compound is always larger than a molecule

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NGSS.MS-PS1-1

In an ionic bond, what happens to the electrons?

• They are shared equally between atoms

• They are completely transferred from one atom to another

• They remain in their original atoms

• They are lost to the environment

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NGSS.MS-PS1-1

What is an ion?

• A compound with a negative charge

• A molecule with a positive charge

• An atom that has lost or gained electrons

• An atom with a different number of neutrons

What is radioactivity?

• The process of atoms gaining electrons

• The process of nuclear decay

• The process of forming covalent bonds

• The process of splitting molecules

What is nuclear fission?

• The process of forming ionic bonds

• The process of combining two nuclei

• The process of forming covalent bonds

• The process of splitting a nucleus into smaller nuclei

What is the concept of half-life used for?

• Identifying the chemical symbol of an element

• Calculating the number of protons in an atom

• Measuring the atomic mass of elements

• Determining the age of carbon-containing substances