Nuclear Decay
Periodic Table
Periodic Trends
Ions
Electron configuration and orbital notation
100
Uranium-238 undergoes alpha decay. What happens during alpha decay?
Atomic number ______ ___ ___
Mass number _______ ___ ___
Atomic number decreases by 2
Mass number decreases by 4
100
What is the definition of the atomic mass?
The mass of a single atom of an element.
100
Fill in the blank:
The atomic radius increases going _____ a group.
down
100
What is an ion?
an atom or group of atoms that has a positive or negative charge.
100
How many electrons can you have in the s orbital?
2
200
Which of the following represents beta decay?
a. Ra-226 -> Rn-222 + He-4
b. C-14 -> N-14 + -1e
b.
200
What side of the periodic table are the metals on?
Left
200
True or False: Electronegativity is a measure of the tendency of an atom to attract a bonding pair of protons.
False
200
Ions form when an atom _____ or ______ electrons.
gains or loses
200
Write the electron configuration for He.
1s2
300
True or False.
During gamma decay the nucleus gets excited releasing an electron and increasing the atomic number by 1.
False
300
what side of the periodic table are the nonmetals on?
Right
300
Ionization energy is the energy required to remove an ________ from a gaseous atom or ion.
electron
300
What is a cation?
An atom with a positive charge.
300
Write the electron configuration for Cl (Chlorine).
1s22s22p63s23p5
400
During alpha decay, what is emitted from the nuclues?
Helium particle
400
What are the most reactive group on the periodic table? (double points for group number and the family name)
Alkali metals and Group 1
400
What is the definition for metallic character?
The easier it is to lose an electron the more metal like an element is.
400
What is an anion?
Atoms with a negative charge.
400
Write the electron configuration and the orbital notation for Be.
500
What happens during positron decay?
Atomic number decreases by 1
500
How many valence electrons do the halogens have? (Hint: includes Iodine)
7
500
What is the trend on the left of the periodic table for reactivity?
As you go down the group it increases. Low to High from top to bottom.
500
If oxygen (O) gained 2 electrons, how would you write the abbreviation for that? (Hint: Xcharge)
O-2
500
How many electrons should be in the 2p orbital for Oxygen?
4