Explanation:
A mathematical expression that is used for the representation of a decimal number between 1 to 10 raised to the power of 10. As a result, a scientific notation will be written using less digits.
For example, 9,460,000,000,000 kilometers can be written is scientific notation as follows.
km
So, when we remove the decimal then we get the number which is equal to 9,460,000,000,000.
Therefore, we can conclude that the scientific notation of 9,460,000,000,000 km is km.
Answer: (3) silicon
Explanation:
Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Silicon (Si)
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: ethane , propanone
and water
Answer:
See explanation and image attached
Explanation:
Yttrium has many isotopes, the lowest mass number of Yttrium is 89Y.
Recall that electron capture converts an electron into a proton and then into a neutron with a consequent emission of a neutrino (v).
In electron capture, the mass number of the daughter nucleus remains the same as that of the parent nucleus while the atomic number of the daughter nucleus is less than that of the parent by one unit.
