Chapter 4: Basic Food Chemistry: The Nature of Matter
This flashcard set introduces essential chemistry concepts, including atomic structure, elements, compounds, bonding, and the periodic table. It’s designed to build a strong foundational understanding for students beginning their chemistry studies.
Define chemistry.
Key Terms
Define chemistry.
The study of matter
Name the three subatomic particles, their charges, and their location.
Proton (+), nucleus
Neutron, nucleus
Electron (-), in orbitals around the nucleus
Define an element.
A substance that contains only one kind of atom.
Differentiate the atomic number and the atomic mass.
Atomic number: number of protons
Atomic mass: sum of protons + neutrons
What will elements on the same column experience? Why?
Similar properties because they contain the same amount of electrons on their outer shell
Define a compound.
Substance in which 2 or more elements chemically combine.
Related Flashcard Decks
| Term | Definition |
|---|---|
Define chemistry. | The study of matter |
Name the three subatomic particles, their charges, and their location. |
|
Define an element. | A substance that contains only one kind of atom. |
Differentiate the atomic number and the atomic mass. | Atomic number: number of protons Atomic mass: sum of protons + neutrons |
What will elements on the same column experience? Why? | Similar properties because they contain the same amount of electrons on their outer shell |
Define a compound. | Substance in which 2 or more elements chemically combine. |
What’s a basic unit of a compound? | Molecule |
What are the roles of structural formulas? | To show how atoms connect to a carbon |
Up to how many shells can atoms have? | 7 |
When are atoms most stable? | When their outer shell is full of electrons (8) |
What will happen if an atom isn’t stable? | Share or transfer electrons from another atom |
Define ionic bonds. | When electrons are transferred from one atom to another. |
What’s a cation? Anion? | Cation: + ion |
Define covalent bonds. | When atoms share one or more pairs of electrons. |
How many electrons can the first atomic shell hold? | 2 e- |
How many electrons can the other atomic shells hold? | 8 e- |
Define pure matter. | Matter in which all the basic unis are the same. |
Define organic and inorganic compounds. | Organic: containing C |
Define physical changes. | Changing shape, size, temp, and/or physical state (phase changes!) |
Define chemical changes. | New substances with different chemical and physical properties are formed; produces a change in color, odor, flavour, or releases a gas. |
Name the 2 types of pure substances. | Compounds and Elements |
Name the 2 types of mixtures. | Homogenous mixtures and Heterogenous mixtures |
Define homogeneous mixtures. | Uniform distribution of particles throughout the sample. |
Define heterogeneous mixtures. | Nonuniform distribution of particles throughout the sample. |