1. Chapter 2: 1. Dalton’s Atomic Theory did NOT describe which of the following observations regarding the structure of matter?
The atoms of any element are identical.
In chemical reactions, atoms are exchanged between starting chemicals to form new chemicals.
Atoms are composed of smaller parts called subatomic particles.
The elements present in a particular compound are always in a ratio specific for that molecule.

2. 2. What are the units of atomic mass?
grams
amu
the mass of an atom does not have a unit
the mass of an atom cannot be determined

3. 3. When is the atomic number of an element NOT equal to the number of electrons in the atom?
when the atom is an ion
when the atom is an isotope
when the electrons are found in the nucleus
when the number of protons in the atom changes

4. 4. Which element is a nonmetal?
sodium (Na)
iron (Fe)
europium (Eu)
sulfur (S)

5. 5. What is the highest energy subshell occupied by electrons in a chlorine atom?f

6. 6. Which statement best describes the octet rule?
a. Atoms will lose a maximum number of electrons during a chemical reaction.
b. Atoms react in order to obtain eight electrons in their valence shell.
c. Atoms will react until they have a total of eight electrons.
d. Atoms will react in order to obtain the electron configuration of the nearest noble gas.