The answer is True . The precision of a measuring is based on the fitness of its scale subdivisions
I think the answer is A because the job of a cell membrane is to provide protection to the plant. A cell membrane has a sturdy wall.
Answer = B = Neutrons and Mass Number
Isotopes are defined as those atoms which have same atomic number but different atomic masses.
Atomic mass is basically the number of protons and neutrons present in an atom.
Atomic number is the number of protons present in an atom.
So, in isotopes the number of protons are same but the number of neutrons vary due to which atomic masses also vary.
In given three isotopes, all have same number of protons but different number of neutrons.
i.e.
H-1 = 1 P + 0 N = 1 u (Proton)
H-2 = 1 P + 1 N = 2 u (Deuterium)
H-3 = 1 P + 2 N = 3 u (Tritium)
Hence, it is clear that the number after H shows a change in number of neutrons and mass number.
Answer:
a. because it is an element
Explanation:
its pure because it only has one type of atom, making it an element
<span>manganese (Mn)
.tellurium (Te)
.chlorine (Cl).
<span>xenon (Xe).</span></span>
