What do we call the electrons that are located in the outermost energy level?
Valence Electrons
100
How do you determine the number of electrons in a neutral atom?
It is equal to the proton number (or the atomic number)
100
What two things are different when it comes to isotopes?
The number of neutrons and the mass number.
100
A positive ion is also called a(n) _________.
cation
100
What is the charge on an aluminum ion?
Al+3
200
What do we call an atom with a positive or negative charge?
An ion
200
**Answers from your chart**
Give the following information for a neutral atom of Selenium:
Atomic Number, Mass Number, #protons, #neutrons, and #electrons
AN = 34, Mass = 80, P = 34, N=46, and E = 34
200
How many more neutrons does Uranium-238 have than Uranium-235?
Uranium-238 has 3 more neutrons.
200
A negative ion is also called a(n) _________.
Anion
200
What is the charge on a fluorine ion?
F-1
300
A horizontal row across the periodic table is called a _____.
A Period
300
**Answers from your chart**
Give the following information for a neutral atom of Radon:
Atomic Number, Mass Number, #protons, #neutrons, and #electrons
AN=86, Mass=222, P=86, N=136, E = 86
300
Are uranium-238 and carbon-12 isotopes? Why or why not?
No, they are atoms of different elements.
300
Metals tend to make what type of ion? and
Do they lose or gain electrons?
Cation/positive ion and they lose electrons.
300
**Using the chart**
For the phosphorus ion: Atomic Number, #protons, #neutrons, #electrons, charge of the ion
AN=15, P=15, N=15, E=18, -3 charge
400
The term that describes two atoms of the same element but they have a different number of neutrons is called ________
An isotope
400
**Answers from your chart**
Give the following information for a neutral atom of Gold:
Atomic Number, Mass Number, #protons, #neutrons, and #electrons
AN=79, Mass=197, P=79, N=118, E=79
400
**Answers from your chart**
Give the following information for the isotope carbon-13:
Atomic Number, Mass Number, #protons, #neutrons, and #electrons
AN=6, Mass=13, P=6, N=7, E=6
400
Nonmetals tend to make what type of ion? and
Do they lose or gain electrons?
Anions/negative ions and they gain electrons
400
**Using the chart**
For the aluminum ion: Atomic Number, Mass Number, #electrons, charge
AN=13, Mass=27, E=10, +3 charge
500
This type of element is usually described as shiny, malleable, and a good conductor of electricity.
Metals.
500
**Answers from your chart**
Give the following information for a neutral atom of Sodium:
Atomic Number, Mass Number, #protons, #neutrons, and #electrons
AN=1, Mass=23, P=11, N=12, E=11
500
What is the difference in the proton number of uranium-238 and uranium-235?
There is no difference. The proton number (92) should be the same because they are both atoms of uranium.
500
How is the charge on an ion determined?
By looking at the number of valence electrons, then determining how that atom would obey the octet rule. (Gain or lose electrons)
500
Determine the #protons, #neutrons, the charge, and the #electrons in the ion for an ion of Barium.