Answer:
Option B = atomic number
Explanation:
Electrically neutral atom:
An electrically neutral atom have equal number of protons and neutrons. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The number of protons or number of electrons are the atomic number of an atom while the number of protons and number of neutrons are the mass number of an atom. Every atom consist of nucleus or a positive center. The protons and neutrons are present with in the nucleus while electrons are present out side the nucleus. All these three subatomic particles construct an atom.
Example:
Consider the example of carbon. It consist of six protons and six electrons. So, its atomic number is six. While the six neutrons are also present in nucleus with six protons that’s why its mas number is 12.
Electron:
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.
Neutron and proton:
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=1.672623×10⁻²⁷Kg
Mass of neutron=1.674929×10⁻²⁷ Kg
Answer: A)
Explanation:
the deposition environment has changed from wind-dominated in the past to stream-dominated today.
Answer:
The product is aqueous 
and 
.
Explanation:
Given:
⇒ 
then,
The reaction will be:
⇒ 
In the above reaction, we can see that
The products is:
aqueous and
Thus the above is the correct answer.
True, in space the tail of a comet will be cold since it a. doesnt have a hot core and b. are typically not found near the sun
