Answer:
226Ra88→222Rn86+4He2
Explanation:
An α-particle usually consists of a helium nucleus which indicates the type of decay that was undergone in this radioactive process.
During α-decay(alpha decay), an atomic nucleus emits an alpha particle.
It is essential for plants to have water for growth.. without water then they will die ..it is also needed for the process of photosynthesis to begin
Answer:
How high the hill is
How much the coaster itself weighs
How long the coaster is
Explanation:
Well, you just have to look for the one that does not have any positive/benefit.
1. is not the answer, since vaccines prevent countless people from disease and death.
2. is not the answer since animal abuse is not okay and the statement shows that science has become more efficient, therefore helping society become more efficient
3. is definitely not a positive effect that biotech has had on society. antibiotic-resistant bacteria endangers everyone. Therefore, this is the answer :)
4. is not the answer because helping people with diabetes be able to afford their medication is very helpful.
Answer:
C. 662.60
Explanation:
the mass of Mn is about 54 grams/mol, (multiply that by 2 since there are 2 Mn's).
the mass of Se is about 79 grams/mol, so multiply that by 7
if you add them, you get 662.60 (approxamitly)