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Topics from your homework you'll be able to complete:
- Characteristics of living organisms
- Physical and chemical properties of matter
- States of matter
- Parts of the atom
- The electron cloud
- Atomic mass and mass number
- Formation of isotopic elements
- Properties and groups of the periodic table
- Relationships between elements, molecules and compounds
- Ionic and covalent chemical bonds
1. Matter: Physical and Chemical Properties
Matter, or material substances, are identified based on their physical and chemical properties. Explore how this process works and learn how chemists use different properties to determine the classification of matter.
2. States of Matter: Solids, Liquids, Gases & Plasma
There are four states of matter: solid, liquid, gas, and plasma. Explore the characteristics of each state of matter and how they relate to and differ from each other.
3. The Atom
The physical basis that everything is composed of is called matter and the smallest unit of matter is called an atom. Learn about the atom, subatomic particles, the nucleus, elements, and the periodic table.
4. The Electron Shell
An electron shell is the space surrounding a nucleus where electrons are usually found. Learn more about the electron shell, energy levels, valence electrons, and noble gases.
5. Atomic Number and Mass Number
An atom is defined as the smallest particle of an element that displays the same properties of that element. Learn about the main components of an atom (protons, neutrons, & electrons), the characteristics of each component, and how to determine the atomic number and the mass number of an atom.
6. What Are Elements?
An element is a unique type of matter which cannot be separated into parts that are different from the initial element. Learn how elements are represented through symbols, the particles (atoms) that make up elements, and how elements can combine to create different items in the real world.
7. Isotopes and Average Atomic Mass
Isotopes are variations of the same element with differing numbers of neutrons and, subsequently, different atomic masses. Learn how scientists consider isotopes when they calculate average atomic mass.
8. The Periodic Table: Properties of Groups and Periods
In the late 1800s, Russian chemist Dmitri Mendeleev created the periodic table by organizing elements by their atomic weight in increasing order. Learn about Mendeleev, discover how the elements on the periodic table are organized, and explore the properties of periods and groups.
9. Understanding the Relationships between Elements, Molecules & Compounds
A molecule is formed when two or more atoms from the same element are chemically bonded, whereas a compound is defined as the chemical bonding between atoms of different elements. Learn about the relationship between elements, molecules, and compounds.
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Other chapters within the Middle School Life Science: Homework Help Resource course
- Introduction to Life Science: Homework Help
- The Parts of Cells: Homework Help
- DNA Replication & Mutation: Homework Help
- Cell Division & the Cell Cycle: Homework Help
- How Living Organisms Get Energy: Homework Help
- Classification of Organisms: Homework Help
- The Origin & History of Life On Earth: Homework Help
- Genetics & Hereditary Traits: Homework Help
- Genetic Engineering Basics: Homework Help
- Natural Selection & Evolution in Life Science: Homework Help
- Microbiology & Types of Microbes: Homework Help
- Introduction to Ecosystems: Homework Help
- Types of Ecosystems: Homework Help
- Changing Ecosystems: Homework Help
- Invertebrates: Homework Help
- Animal Behavior & Communication: Homework Help
- Mammal Reproduction & Development: Homework Help
- The Cardiovascular System: Homework Help
- The Blood Vessels: Homework Help
- The Digestive System: Homework Help
- The Urinary & Endocrine Systems: Homework Help
- The Muscular System: Homework Help
- The Skeletal System & Connective Tissue: Homework Help
- Sight, Hearing & Other Senses: Homework Help
- Health Issues & Concerns: Homework Help
- Plant Biology & Structure: Homework Help
- How Plants Grow & Reproduce: Homework Help
- Environmental Concerns: Homework Help
- Natural Resources: Homework Help