Answer:
C.11
Explanation:
Boron-11 makes up around 80% of all natural Boron. And, typically, the quickest way to determine the most abundant isotope of an element is to just round the atomic mass to the nearest whole number.
Its arbitrary. It was developed on the greek phoenetic system and never reallybwas explained.
<span>plagioclase feldspars have striations and potassium feldspars don't have striations</span>
The net force is 11.1 because 23.5-12.4 is your net force
hope this helps:)
The two theories were:
1.Geocentric theory stating that earth is the centre of the universe and sun revolves around it.
2.Heliocentric theory stating that the earth revolves around the sun.
