Nuclear Chemistry
What is the charge of an alpha particle?
+2
Magnesium is in of which periodic group?
Alkaline earth metals
What is the definition of "Ionization Energy"?
The energy required to REMOVE the most loosely held valence electrons from an atom to form ion
Name 3 characteristics of non-metals
Lacks luster, poor conductivity, brittle
What is the equation for mass?
Mass= Density * Volume
When an element undergoes beta decay, it's mass changes by:__________
Zero (0)
Which element is in period 4 and is an alkali metal?
Potassium (K)
Which atom in group 2 has the smallest atomic radius?
Be (Beryllium)
How many electrons are in an atom of S2- ?
18 electrons
Mass= 40g
Volume= 20mL
What is the Density? (with units)
2g/mL
If carbon-15 has a half life of 15 seconds, how much of the sample remains after 30 seconds? (in percent)
25% of the original sample (2 half lives)
Which group on the periodic table is the least reactive?
Noble gases (group 18)
As you move from left to right on the periodic table, Electronegativity _________
Increases
An element with 2 valence electrons will form what kind of ion. What happens to it's size?
Positive ion, decrease in size
Density= 2 g/mL
Volume= 20mL
What is the Mass? (with units)
40g
What is the daughter particle after a particle of Uranium - 235 undergoes alpha
U-235 ==> He-4 + Th-231
Which group forms colored ions in solution?
transition metals
Going from the bottom to the top of a periodic table group, atomic radius will:________
decrease
What table will you go to if you are looking to find the particle with the most mass? What particle is it?
Table O, Alpha particle
Mass= 35g
Density= 5g/cm3
What is the Volume? (with units)
7cm3
Through what process does a heavy nucleus split into two lighter nuclei, through the bombardment of a neutron particle.
Fission
which two groups contain the only two liquid elements at STP? What are those two elements
groups 12 & 17. Mercury and Bromine
which element in the periodic table has the highest electronegativity
Flourine
Half life: What fraction of an original sample of I131 remains unchanged after 24 days?
1/8
Density= 2g/cm3
Mass= 9g
What is the Volume? (with units)
4.5cm3