Pretest: Chemistry I H

Properties that can be observed without changing the chemical composition of the sample of matter

• chemical properties
• physical properties

Describes an occurrence that has been tested under different conditions over a long period of time

• Theory
• Hypothesis
• Law
• Scientific fact

Anything that has mass and volume

• Element
• States of matter
• Weight
• Matter

Elements and compounds are classified as this

• Heterogenous mixture
• Homogeneous mixture
• Pure substance
• Stuff

Chemical changes are also known as _____.

• a chemical reaction
• chemical properites
• mixtures
• pure substances

Have an infinite number of significant figures

• Exact number
• Measurements
• Calculations
• Estimations

______ is the study of matter and the changes it undergoes

• Chemistry
• Physics
• Biology
• Earth Science

Which of the follow are the REACTANTS: NaOH + HCl 🡪 H2O + NaCl

• NaOH + HCl
• H2O + NaCl

Which of the follow are the Products: NaOH + HCl 🡪 H2O + NaCl

• NaOH + HCl
• H2O + NaCl

The name of the type of ion when electrons are lost.

• Anion
• Cation
• Isotope
• Atom