Answer:
Resistance in insects develops when the same insecticide (or class of insecticides) is used against a pest population over and over again. Some insects will survive the same dose that kills their friends. Those that survive pass on that survival trait to their offspring.
Explanation:
Hope this helps
Gases dissolve easily in water when they react with water.
<h3>Dissolution of a gas in water</h3>
The question is incomplete but I will discuss the dissolution of a gas in water. A gas dissolve easily in water when the gas can react with water. In this case; CO2+H2O ⇄ H2CO3.
Let us note that the dissolution of a gas in water is an exothermic process hence does not occur at elevated temperatures.
Learn more about gases:brainly.com/question/1369730
Answer:
The answer is the letter c the third one
Answer:
Electron
Explanation:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol= e-
Mass= 9.10938356×10-31 Kg
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.
Properties of cathode ray:
The ray is travel in straight line.
The cathode ray is independent of composition of cathode.
When electric field is applied cathode ray is deflected towards the positively charged plate.
Hence it was consist of negatively charged particles.
While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Symbol of proton= P+
Symbol of neutron= n0
Mass of proton=1.672623×10-27 Kg
Mass of neutron=1.674929×10-27 Kg
<span>C. neutral, with the number of protons equaling the number of electrons.
is the right answer
because number of neutrons vary from atom to atom</span>