Answer:
Here's what I get.
Explanation:
The isotopic symbol for an atom is
The atomic number (Z) is the number of protons (p) in the nucleus.
In a neutral atom, the number of electrons (e) equals the number of protons. n = e
The mass number (A) is the number of protons plus the number of neutrons (n).
A = p + n or
n = A - p
(a) 
p = 5
e = 5
n = 10 - 5 = 5
(b) 
p = 18
e = 18
n = 36 - 18 = 18
(c) 
p = 38
e = 38
n = 85 - 38 = 47
(d)
p = 5
e = 6
n = 11 - 6 = 5
Explanation:
Gas mask filters include activated carbon,
absorbents that trap toxins in millions of micro-pores. It is the same compound used to filter water and treat ingestion of poisons. The activated carbon traps the toxins, but in gas masks it is further augmented with metal oxides, such as copper and molybdenum, to help break down the toxins.
A lot of research is being done in Berkeley labs
Answer:
a
Explanation:
because you need to add 2 to to hf to make it equal to h2
