Answer:
Nucleus
Explanation:
they originate in the nucleus
For any given element the mass number can be found by adding the protons and the neutrons.
In this case its 10 protons plus 11 neutrons which gives us 21 as the mass number.
Answer:
step 2 then step 1 then step 3 then step 4
Explanation:
First boil it. Then identify the situation which is most conducive to boiling
.
While this, a liquid must overcome the attractive forces between molecules and the outside pressure pushing down on the liquid's surface.
The liquid will boil when there is weak intermolecular attraction and low atmospheric pressure.
Steps to be followed:
Pentane at high altitude
Hexane at high altitude
hexane at sea level
hexanol at sea level
Answer:
It is b to use a telescope