(A+P) Chemistry portion. Chapter 2

organelles are...

• Organelles are specialized structures within cells that perform specific functions.
• Organelles are the same as organ systems in animals.
• Organelles are only found in plant cells.
• Organelles are the building blocks of DNA.

Tags

NGSS.MS-LS1-2

isotopes are

• Isotopes are always radioactive variants of elements.
• Variants of a chemical element with the same number of protons but different numbers of neutrons.
• Different elements that have the same atomic mass.
• Atoms with the same number of neutrons but different numbers of protons.

Chemical bonds are...

• the energy released during a chemical reaction
• the process of breaking down molecules
• the arrangement of electrons in an atom
• the forces that hold atoms together in molecules and compounds

Tags

NGSS.HS-PS1-3

A molecule is...

• A molecule is a single atom.
• A molecule is a type of chemical reaction.
• A molecule is a solid substance only.
• A molecule is a combination of two or more atoms shared by electrons.

Tags

NGSS.MS-PS1-1

Ions are...

• particles that only exist in solid form
• charged particles that result from the loss or gain of electrons
• neutral particles that do not interact with electrons
• unstable particles that cannot form bonds

Tags

NGSS.HS-PS1-3

NGSS.HS-PS3-5

Covalent bonds are

• Covalent bonds are created when atoms collide with each other.
• Covalent bonds are formed by the sharing of electron pairs between atoms.
• Covalent bonds involve the attraction between charged ions.
• Covalent bonds are formed by the transfer of electrons between atoms.

Tags

NGSS.HS-PS1-1

What are the weakest chemical bonds?

• Covalent

• Hydrogen

• Ionic

Enzymes are...

• Enzymes are inorganic compounds.
• Enzymes are energy sources for cells.
• Enzymes are structural proteins.
• Enzymes are protein catalysts.

Enzymes lower the activation energy of reactions

• True

• False

pH is...

• a unit of measurement for volume
• a type of chemical reaction
• a measure of acidity or alkalinity of a solution
• a measure of temperature