# chemistry

posted by .

When californium-249 is bombarded by oxygen-18, a new isotope and four neutrons are produced.

• chemistry -

number preceding symbol = atomic number(a subscript)
number after symbol = mass number(a superscript)
In nuclear equations the subscripts add up and the superscripts add up.

98Cf249 + 8O18 ==> nXm + on1 + on1 + on1 + on1.

So your job is to determine n, X, and m.
Remember the numbers must add up on both sides to the same thing.
For preceding number (the subscripts).
98 + 8 = n + 0 + 0 + 0 + 0 so n = 106
For number after the symbol (superscripts)
249 + 18 = m + 1 +1 +1 +1
m = 249 + 18 - 4 = 263
Now look on the periodic table and identify element X, element # 106. That's Sg. So the equation, in full, is
98Cf249 + 8O18 ==> 106Sg263 + 4 on1.

## Similar Questions

1. ### Chemistry

write isotpoic symbols of the form X-A (for example, C-13) for each of the following isotopes. **Do I add the number of protons and neutrons together to get the answer?

1. A Geiger counter measures radiation indirectly by measuring flashes of light electrons released by ionization speaker static curies answer: electrons released by ionization 2. Reactor control rods are made of a substance that absorbs …
3. ### chemistry

Lithium-6 has an atomic number of 3. how many neutrons are in this isotope?
4. ### chemistry

boron-10 has an atomic number of 5. how many neutrons are in this isotope?
5. ### Chemistry

The most abundant isotope of uranium,238U , does not undergo fission. In a breeder reactor, however, a 238U atom captures a neutron and emits two beta particles to make a fissionable isotope of plutonium, which can then be used as …
6. ### Chemistry

Consider the following hypothetical nuclear breakdown: Fermium-258 (Fm-258) loses three alpha particles and two neutrons. What is the new element that is formed (in terms of chemical symbol, atomic number and atomic mass)?
7. ### Chemistry

When Pb-208 bombarded with Ni-64, a new element and six neutrons are produced. What isotope of the new element is produced by this reaction?
8. ### Chemistry

Consider that: the tetravalent cation of an isotope has 78 electrons and 128 neutrons; Nuclear relative mass of the same cation is 1.44% higher than the relative nuclear mass of its most common isotope based on these data, calculate …
9. ### Chemistry

Consider that: the tetravalent cation of an isotope has 78 electrons and 128 neutrons; Nuclear relative mass of the same cation is 1.44% higher than the relative nuclear mass of its most common isotope based on these data, calculate …
10. ### chem

Consider the isotope arsenic-76 How many protons are in an atom of this isotope?

More Similar Questions