Insecticides are <span> Chemical poisons.
</span><span>A. Chemical poison</span>
Ok. I finally understood that you need to complete (fill in the blank) the last sentence: The weight of a space probe on the surface of Mars is about ______________
The answer is one third its weight on the surface of Earth.
You can find that by using the formula for the weight:
weight = mass * acceleration due to gravity
So, given that the mass is constant and the acceleration due to gravity is one third, the weight is also one third.
Answer:
See below.
Step-by-step explanation:
The two isotopes are Cl-35 and Cl-37.
The average atomic mass (35.45 u) is closer to 35 u, so most of the atoms are Cl-35.
mass number = number of protons + number of neutrons
A = p + n
35 = 17 + n
n = 35 – 17
n = 18
∴ Most chlorine atoms contain 18 neutrons.
...
....................................