Chapter 1
What is chemistry?
The study of matter.
4 significant figures
What is the basic unit for volume?
liters (L)
What charge does the nucleus have?
Positive
H2O (g) -> 2H2 (g)+ O2 (g)
chemical
True or False: When conducting an experiment you are always trying to prove the hypothesis correct?
False
584000cm - round to one significant figure.
600000 cm
change 5dm to cm
5000cm
Where are the electrons?
Outside in the electron cloud
H2O (g) -> H2O (l)
physical
What are the four states of matter?
Solid, liquid, gas, plasma.
0.0003080 m
convert to scientific notation
3.080 x10-4 m
What is the formula for density?
density = mass/volume
What makes the atomic mass of an atom?
Protons + neutrons
What is the most abundant element is a banana?
K - potassium
If a solid changes to a gas, what is the name of the physical change?
Sublimation
What is the roman numeral for Nona?
IX
Convert 58.3 Fahrenheit to Kelvin.
288 Kelvin
What is more stable 16O or 18O?
16O
What is the symbol for gold?
Au
What state of matter has more kinetic energy solid or gas?
Gas.
What are the 7 diatomic elements?
*double the points*
H2- hydrogen
N2- nitrogen
F2- fluorine
O2- oxygen
I2- iodine
Cl2- chlorine
Br2- bromine
A scuba diver jumps into the ocean in Antarctica, does he lose heat or gain heat?
He loses heat.
What particle of an atom makes the atom radioactive?
neutrons
What two elements are liquids at room temperature?
Br - bromine
Hg -mercury