States of Matter
Atomic Structure
Element, Compound, Molecule
Counting Atoms
Physical vs. Chemical
Chemical Equations
Law of Conservation of Mass
1
What state of matter has the least amount of energy?
Solid
1
Name all three subatomic particles.
Protons, neutrons, & electrons
1
True or false? A compound is made up of 2 or more different atoms combined.
True
1
How many carbon atoms in this formula? C6H1206
Six
1
Which of these is a physical change: Cutting paper, dissolving sugar in lemonade, melting ice
All of them
1
What type of chemical reaction absorbs heat?
Endothermic
1
What does the Law of Conservation of Mass state?
Mass is neither created nor destroyed in a chemical reaction
2
As temperature increases, atoms will move ________
Faster
2
The atomic mass number for an element identifies the number of....
Protons & neutrons
2
Element, compound, or molecule?
Element
2
How many total atoms are in this molecule? Na2SO4
Seven
2
Which of these is a chemical change: Water boiling, rusting iron, breaking glass
Rusting iron
2
What type of chemical reaction releases heat?
Exothermic
2
In a balanced equation, both sides will be __________
Equal in mass
3
Is air matter? Why or why not?
Air is matter because it has mass and takes up space.
3
The atomic number of an element identifies the number of....
Protons & electrons
3
Element, molecule, or compound?
Compound
3
How many oxygen atoms are in this formula? Al2(SO4)3
Twelve
3
Name one chemical property of matter.
Examples: Flammability, reactivity, ability to rust, toxicity
3
2H2+O2→2H2O: This is an example of a chemical _______________
Equation
3
The left side of a chemical equation is known as the __________
Reactants
4
Which state of matter won't take the shape of its container?
Solid
4
What is the center of an atom called?
Nucleus
4
Element, molecule, or compound?
Molecules
4
How many hydrogen atoms are in this formula? 5NaHCO3
Five
4
Name one physical property of matter.
Examples: Color, hardness, density, solubility, boiling point, taste, state/phase
4
The four in NH4 is called a _____________
Subscript
4
The right side of a chemical equation is known as the _______________
Products
5
What are the two particles that make up all matter?
Atoms & molecules
5
If you subtract the atomic number from the atomic mass, you will be able to find...
The number of neutrons
5
Element, molecule, or compound? CO2
Compound
5
How many atoms are present in H₂C₂O₄?
Eight
5
What is the difference between a physical property and a chemical property?
A physical property can be observed without changing the substance, where a chemical property shows potential to create something new.
5
The 5 in 5CO2 is called a _____________
Coefficient
5
Balance this equation by finding the missing mass: 5.3g + 8.2g --> ?? + 4.1g
9.4g