Answer:
Positron emission
Explanation:
In positron emission, a proton transforms into a neutron. This alteration results in a daughter nucleus with its mass number increased by 1, while the atomic number remains unchanged. The formation of a new neutron boosts the neutron count in the daughter nucleus, thus enhancing the N/P ratio.
Concurrently, a positron is emitted along with an anti-neutrino to ensure spin conservation.
Answer: D) X-rays exhibit lower frequency than microwaves
Explanation:
A scientific statement is one that relies on evidence gathered from experiments and direct observation of the natural world. Such a statement can be corroborated through appropriate experimental methods.
The option D illustrates a scientific statement because it allows for the frequency of both microwaves and X-rays to be assessed and contrasted. This process entails experimental and observational techniques, which validates it as a scientific statement.
The result is 0.14303691.
Carbon-13 (¹³C) is a stable isotope of carbon with a mass number of 13, composed of six protons and seven neutrons.
Isotopes are elements that share the same atomic number but have different mass numbers, meaning they have a varying number of neutrons.
ω(¹³C) = 1.10% ÷ 100%.
ω(¹³C) = 0.0110; this indicates the natural abundance of carbon-13.
m(¹³C) = 13.003355; the atomic mass assigned to carbon-13.
ω(¹³C) · m(¹³C) = 0.0110 · 13.003355.
ω(¹³C) · m(¹³C) = 0.14303691.
