Independent is what you are testing with. dependent is what you ARE testing. constant is the control so like for example the time, or the same material etc. tools should be on your paper depending on what lab it is :)
Answer:
Nickel (Ni) is most likely to form more than one kind of positively charged ion as it is a transition metal and all of the ther metals have a fixed ion charge.
Na becomes Na+
Ba becomes Ba +2
Mg becomes Mg+2
Explanation:
please mark brailiest
What about it do you want answered
Answer:
The answer to your question is letter B.
Explanation:
Data
Polonium-208 half-life = 2.9 years
Original sample = 2 mg
Total time = 8 years
Process
Mass Time
2 mg 0 years
1 mg 2.9 years
0.5 mg 5.8 years
0.25 mg 8.7 years
The mass of sample must be between 0.5 and 0.25 mg, from the options given the only possible answer is<u> letter B 0.296 mg</u>