What is the density of water? Define matter and subatomic particles. What are the changes of state? Define physical and chemical properties. Explain the trends in the periodic tabl... What is the density of water? Define matter and subatomic particles. What are the changes of state? Define physical and chemical properties. Explain the trends in the periodic table and identify a cation and anion.
Understand the Problem
The question outlines topics covered in a Grade 9 Science exam, focusing on various concepts in chemistry and physics. It includes specific inquiries about density calculation, matter and subatomic particles, changes of state, properties of matter, periodic table trends, and identification of chemical species.
Answer
Water's density is ~1 g/cm³. Matter: has mass and space. Subatomic particles: protons, electrons, neutrons. State changes: condensation, evaporation, sublimation, melting. Cation: positive ion. Anion: negative ion.
The density of water is approximately 1 gram per cubic centimeter. Matter is anything that has mass and takes up space, composed of atoms and molecules. Subatomic particles include protons, neutrons, and electrons. Changes of state include condensation, evaporation, sublimation, and melting. Physical properties can be observed without changing a substance's composition, while chemical properties involve how a substance interacts with other substances. Periodic table trends include increasing atomic number, recurring groups of chemical properties, and element classification as metals, nonmetals, or metalloids. Cations are positively charged ions, and anions are negatively charged ions.
Answer for screen readers
The density of water is approximately 1 gram per cubic centimeter. Matter is anything that has mass and takes up space, composed of atoms and molecules. Subatomic particles include protons, neutrons, and electrons. Changes of state include condensation, evaporation, sublimation, and melting. Physical properties can be observed without changing a substance's composition, while chemical properties involve how a substance interacts with other substances. Periodic table trends include increasing atomic number, recurring groups of chemical properties, and element classification as metals, nonmetals, or metalloids. Cations are positively charged ions, and anions are negatively charged ions.
More Information
Water's density is often used as a standard for measuring specific gravity of other substances. Subatomic particles determine atomic structure and chemical properties.
Tips
Common mistake: Confusing cations and anions. Remember: 'T' in ca'T'ion for posi'T'ive.
Sources
- 2: The Physical and Chemical Properties of Matter - chem.libretexts.org
- Organizing Atoms and Electrons: The Periodic Table - learner.org
- Physical and Chemical Properties of Matter – Introductory Chemistry - uen.pressbooks.pub
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