Atoms and Molecules
Anything that has mass and takes up space
Matter
A pure substance that is made from a single type of atom
An element
Atoms that are held together by chemical bonds
Molecules
If you have a swimming pool that has a pH of 6.8 and the desired pH is 7.5, this will need to be added.
A base
The type of variable that is kept the same
Controlled variable
A particle of matter that uniquely defines a chemical element
An atom
Element symbol: Na
Sodium
Substance formed when two or more chemical elements are chemically bonded together
Compound
The pH range goes from ___ to ____
0-14
A synonym for hypothesis
Prediction, guess (or similar)
Three parts of an atom
Protons, neutrons and electrons
What is the chemical symbol for gold?
Au
Type of bond when a positively charged ion forms a bond with a negatively charged ions and one atom transfers electrons to another
Ionic bond
An acid that is produced by our muscles when we exercise
Lactic acid
The type of variable that is changed
Independent variable
The number of carbon atoms in carbon dioxide
1
Number of protons = ___________
Atomic number
Gas that is formed when baking soda and vinegar are mixed together
Carbon Dioxide
Citric acid is found in many fruits, yet fruits are safe to eat. Which is most likely to be the pH of citric acid: 1, 4, 7, or 10
4
The type of variable that is measured
Dependent variable
The 2 in the chemical formula H2O means this.
Two atoms of hydrogen
Number of protons + number of neutrons = _____________
Mass number
If hydrochloric acid and sodium hydroxide react, these two products are formed. HCl + NaOH→ ______+_____
NaCl (salt) and H2O (water)
A liquid is determined to be an acid or a base depending on the type of _______ in the liquid.
Ions
The seven parts of our lab report
Purpose, Introduction, Hypothesis, Materials, Procedure, Results, Conclusion