History
Atomos
What are the three subatomic particles and what are their charges?
Proton, Neutron, Electron
Positive, Neutral, Negative
What does an atom gain or lose to become an ion?
Electrons
What is an isotope?
Atoms of the same element with the same number of protons, but different number of neutrons.
What does amu stand for?
Atomic Mass Unit
Which subatomic particle did JJ Thomson discover and what model of the atom did he create?
Electron, Plum Pudding Model
Indium has 49 protons, 66 neutrons, and 49 electrons. What is the mass number for Indium?
115 amu
If a Bromine ion has charge of -1, how many total electrons does it have?
36
Atomic mass takes into account 2 things. What are those two things?
Percent Abundance and the Mass of each isotope
Who discovered the proton?
Goldstein
Who discovered the neutron?
James Chadwick
Polonium has 84 protons, 84 electrons, and a mass number of 209. How many neutrons does it have?
125 neutrons
If Rhenium (Rh) has lost 7 electrons, what is it's charge?
+7
Tungsten (W) has an atomic mass of 183.84 amu. W has 2 common isotopes.
One of these isotopes has a mass of 182.947 amu and has 13.28% abundance.
What is the % abundance of the other isotope?
86.72%
What is the difference between a cation and an anion?
Cation is positive ion, Anion is a negative ion
Which of these things is not part of Dalton's atomic theory?
a. All elements are made up of atoms
b. All atoms of the same element are the same
c. Atoms contain subatomic particles
d. A compound contains atoms of more than one element
c. Atoms contain subatomic particles
Tungsten (W) has a mass number of 184 and 110 neutrons. What is tungsten's atomic number?
74
Calcium has 20 protons, 20 neutrons, and 18 electrons, write the element symbol in the correct format.
4020Ca2+
Chlorine has 2 naturally occurring isotopes.
Cl–35 has a mass of 34.969 amu and occurs 75.770% of the time.
Cl–37 has a mass of 36.966 amu and occurs 24.230% of the time.
What is the atomic mass of chlorine?
35.453 amu
How do you calculate the number of electrons in an ion?
# Electrons = #Protons - Charge
What 3 things did Rutherford discover during his gold foil experiment?
1. The atom is made up of mostly empty space
2. The atom contains positively charged particles
3. The nucleus is positively charged and dense in the center of the atom
Rubidium has 37 protons, 49 neutrons, and 37 electrons. Write the symbol in the correct format.
8637Rb
Tantalum has 73 protons, 108 neutrons, and 68 electrons, write the element symbol in the correct format.
18173Ta5+
Lithium has an average atomic mass of 6.941 amu. Lithium has two common isotopes. The one isotope has a mass of 6.015 amu and a relative abundance of 7.49%.
a. What is the abundance of the other isotopes?
b. What is the mass of the other isotope?
a. 92.51%
b. 7.016 amu
Label the following as cations or anions.
a. Li+ d. As3-
b. Be2+ e. Sc
c. Br f. Au+
a. Cation d. Anion
b. Cation e. Cation
c. Anion f. Cation