Matter
The basic building blocks of everything in the known universe.
What are atoms?
A chemical reaction creates a __________.
What is a new substance?
The measure of the amount of matter in a substance or an object.
What is mass?
The molecules on the left side of a chemical equation.
What are reactants?
The temperature at which a substance turns from a liquid to a gas.
What is the boiling point?
The elements are organized into this.
What is the Periodic Table of Elements?
A chemical reaction has occurred when substances’ ______ change.
What are properties?
This is how tightly packed the atoms are in a given space.
What is density?
The molecules on the right side of a chemical equation.
What are products?
A mixture that is uneven throughout.
What is a heterogeneous mixture?
The periodic table organizes the elements in order using _____.
What is atomic number?
A metal was added to an acid and lots of bubbling and fizzing was seen, the metal disappeared, and pH went from 2 to 5. What are the signs of a chemical change?
Bubbling and fizzing
Change in pH
Metal disappeared
Physical changes are when...
the appearance of the atoms, such as spacing, change but the atoms do not break apart or combine with other atoms.
The arrow in the chemical reaction means ____.
The density of a substance with a mass of 60 g and a volume of 30 mL.
What is 2g/mL?
What are molecules?
In the chemical reaction H2 + 2O2 --> 2H2O, how are the reactants different from the products?
The reactants are gases Hydrogen and Oxygen, the product is a liquid, liquid water.
The formula for density is ____.
What is Density = Mass/volume?
This is created when sodium reacts with chlorine.
What is table salt?
The density of a substance with a mass of 80 g and a volume of 20 mL?
What is 4g/mL?
This number, unique to each element, represents the number of protons in an atom’s nucleus and determines the element’s identity on the periodic table.
What is the atomic number?
The part of the atom that changes in a chemical reaction is/are the ________.
What are the electons?
This is the ability to dissolve in another substance.
What is solubility?
Balance the following chemical equation:
___N2 + ___O2 --> ___ N2O5
What is
2 N2 + 5 O2 --> 2 N2O5 ?
The density of a block that has a height of 3.0 cm, length of 10 cm, and width of 2.0 cm. Its mass is 180 g.
What is 3g/mL?