From another answer, it is most likely E. Horizon. Hope this helps!
Answer:
A noble gas configuration of an atom consists of the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons. So for sodium, we make the substitution of [Ne] for the 1s22s22p6 part of the configuration. Sodium's noble gas configuration becomes [Ne]3s1. That is the answer.
Explanation:
Brainliest Please.
Answer:
The phosphorus minerals deposits that are available right now are not enough for the future. A large part of food production depends on phosphorus being produced. Phosphorus is commonly used as fertilizer and a lot of farmers are dependent on it.
Answer: e. 4.8 h
Explanation:
Expression for rate law for first order kinetics is given by:
where,
k = rate constant
t = age of sample
a = let initial amount of the reactant
a - x = amount left after decay process
a) for rate constant
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
b) for 160.0 g to decay to 2.07 g
The time required for a 160.0-g sample of 158Eu to decay to 2.07 g is 4.8 hours