Elements & Compounds
The mass # of an element is equal to what?
The # of protons & neutrons in the nucleus of that atom
OH-
hydroxide
An atom's chemical behavior is determined mostly its the number of what?
valence electrons
What is the main difference between ionic & covalent bonds?
Ionic bonds exchange electrons & covalent bonds share electrons
What is the number 1 rule in chemistry lab?
No eating or drinking during lab
Name the compound: Al2O3
aluminum oxide
NO3-
nitrate
Most atoms strive to have how many valence electrons?
8
Dissolving one substance in another is an example of a physical or chemical change?
physical change
Which travels faster, light or sound?
light
Name the compound: P2O3
Diphosphorous trioxide
CO32-
carbonate
In a polar covalent bond, are electrons shared equally or unequally?
unequally
T/F: Polar covalent compounds can dissolve both other polar covalent compounds and non polar covalent compounds.
False: They can only dissolve other polar covalent compounds and ionic compounds
What is the only substance that occupies more volume in its solid phase than its liquid phase?
water
Which of the following is not a noble gas?
He, Ne, Br, Ar, Kr
Br (Bromine)
SO32-
sulfite
nonmetals; metals
What is the formula for density?
density = mass/volume
How many liters are in 1 gallon?
3.78 L = 1 gal
What is the difference between the various isotopes of an atom?
Isotopes have the same number of protons but different numbers of neutrons
C2H3O2-
acetate
What does VSEPR stand for?
Valence Shell Electron Pair Repulsion
What is the general idea behind the kinetic theory of matter?
How many kilograms are in 1 slug?
14.59 kg = 1 slug