atoms
A particle that is positively charged is a
proton
Which choice describes the law of conservation of mass
mass is neither created or destroyed
What year did Ms. Wyatt graduate
2014
do you eat in the lab setting
no
half life decrease by
50
Two particles located in the nucleus are
protons and neutrons
Chemical equations must be balanced in order to satisfy
the law of conservation of mass
how many kids does Ms. Wyatt have
2
Horseplay and practical jokes in the laboratory are
always against the rules
A mystery element has a half life of 2 days. After 4 days, what percent of the element would remain?
25%
Electrons are located
on the outside of the nucleus
Balance
AgNO3(aq) + Cu(s) --> Cu(NO3)2(aq) + Ag(s)
2,1,1,2
what sports did Ms. Wyatt play in high school
basketball, softball, cheerleadling
If you do not understand a direction or part of the lab procedure, you should
ask the teacher before beginning
what is the half-life of uranium-238?
4.5 billion years
Given the element oxygen give the number of protons, electrons, and neutrons
8p, 8e, and 8n
BaF2 + Na3PO4 --> Ba3(PO4)2 + NaF
3,2,1,6
where is Ms. Wyatt from
Monticello
Laboratory work can be started immediately upon entering the laboratory
False
The half-life of palladium-103 is 17 days. How many days does it take for 16 g of palladium-103 to decay to 1.0 g?
68 days
how do you find the correct number of neutrons for an element
mass number - atomic number
Co2(CrO4)3 +BaCl2-->CoCl3 + BaCrO4
1,3,2,3
Name three teachers that are still here that also taught Ms. Wyatt
Hardy, Savage, Taylor, Scroggs, McCalum
List the three main rules for labs in Ms. Wyatt's class
1. dress appropriately
2. no horseplay
3. Always follow instruction
What type of decay can be stopped by a sheet of paper?
alpha decay