Counting Atoms/Balancing Equations
The 6, 12, and 6 in C6H12O6 are all called ________.
How is an element symbol represented?
Either one uppercase letter or one uppercase letter followed by a lowercase letter.
What is a physical property?
A characteristic or trait that is observed or measured and is used to describe matter.
What is the main goal of photosynthesis?
To produce chemical energy (glucose).
What's the difference between a compound and a molecule?
A compound is made up of 2 or more elements while a molecule is just a group of atoms.
How many atoms are in 4As₂S₃?
20
What is the element symbol for #85?
At
What is a chemical change?
A reaction resulting in the formation of a new substance, usually irreversible.
ATP=_______
Energy
Energy and temperature have a _________ relationship.
Direct
Is this equation balanced? If not, why?
N2 + 3H2 ----> 2NH3
Yes, it is balanced
What element is Al?
Aluminum
Define luster.
Shininess or the ability to reflect light.
Cellular Respiration occurs in what organelle?
Mitochondria
What is it called when a gas turns into a liquid?
Condensation
Is this equation balanced? If not, why?
H2 + O2 ----> H2O
What number and element is Hg?
Mercury, 80
physical change, chemical change
True or false: Photosynthesis is an endothermic reaction.
True
Which state of matter has the most energy (solid, liquid, or gas)?
Gas
How many atoms are in 10CO2?
30
What does the element number/atomic number represent?
The number of protons.
This change results in the identity of matter remaining the same.
Physical change.
What is the equation for photosynthesis in words?
(carbon dioxide + water) produces (glucose + oxygen)
True or False: There is a change in temperature during a phase change.
False