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29 Terms
Plutonium-239 has a half-life of 24,000 years, where would you rank it as a possible nuclear medicine therapy?
No treatment value
How many seconds are in three days?
259,000 s
What conversion takes place when beta particles are emitted?
A neutron is converted into a proton
When the following reaction takes place, what is the missing isotope?
235/92 U + 1/0n → 97/ 42Mo + 21/0 n + ____
137/50 Sn
If you are a radiologic technician, which of the following devices would you use daily?
Dosimeter
Which of the following best describes a chain reaction?
When critical mass is reached and continues nuclear fission reaction takes place
What is the isotopic symbol of 238/92 U ?
Uranium- 238
C0-60 has a half-life of 5.3 yr. How many years will it take for Co-60 to decay four half-lives and what fraction would still be present from the original amount?
21.2 yr and 1/16th remaining
Which of the following measurement units are the same for Metric and SI units?
Time
What is the SI unit for an absorbed dose of radiation?
Gray (Gy)
What is another name for an unshared pair of electrons in a covalent bond compound?
Lone pair of electrons
Which of the following is not an ionic compound?
BF3 (Boron trifluoride)
How many bonded electrons are present in the following structure of carbon dioxide?
8 electrons
Which element is represented by the following Lewis Dot symbol?
B (Boron)
How many covalent bonds are generally formed by an oxygen atom?
2
Which choice accurately represents the molecular geometry and name of CCl4?
Tetrahedral, carbon tetrachloride
Which statement concerning the ion Rb+ is correct?
Rb+ has an octet of electrons in its valence shell
What is the chemical formula for the ionic compound calcium selenide?
CaSe
What is the charge on the iron ion in the compound Fe2O3?
+3
Which is the correct formula for Sodium Nitrate?
NaNo3
Which energy level or orbital does the element carbon fill its last electron into?
2p orbital
As you go down a group on the periodic table, the ionization energy___
Decreases
The group 8A (18) elements___
Are unreactive and are rarely found in combination with other elements
Which choice has the correct element and valance electrons displayed?
O, 6 valance electrons
The electron configuration of 1s2 2s2 2p6 3s2 3p6 represents what element?
Argon
Which of the following is an accurate assumption of the isotope average mass based upon the following information? Chlorine-35 has an isotopic abundance of 75.77% and chlorine-37 has an isotopic abundance of 24.24%, which value should the average atomic mass be closet to?
35.5 amu
Which element has the correct name, symbol and number of protons displayed?
Phosphorus, P, 15 protons
How many protons, electrons, and neutrons are present in Scandium?
21 protons, 21 electrons, and 24 neutrons
Al element becomes Al3+, what has taken place?
The loss of 3 electrons to resemble neon.