False hope this helps
no subscripts
no 1's for coefficients
WILL GIVE BRAINLIEST!
Answer:
I kinda forgot. I'm sorry if I didn't answer your question.
Explanation:
(2) 79 (4) 197
The atomic number of an element is the number of its protons. Here, the total number of electrons is 79 and thus the element s having 79 protons also. Thus, option 2 is correct.
An atom is composed of nucleus and and electrons. Protons and neutrons are located inside the nucleus. Electrons are revolving around the nucleus.Electrons are negatively charged particles and protons are positively charged whereas neutrons are neutral.
The atomic number of an element is the number of its electrons or protons. For a neutral atom the number of electrons and protons are equal. Thus all the positive charges are neutralized by equal number of negative charges.
The electrons are filled in different orbitals and from the configuration we can understand the number of electrons given is 79. Thus its number of electrons and protons is 79.
Hence, the number of protons for the element with the given electronic configuration is 79. The name of this element is gold.
To find more about protons, refer the link below:
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Answer:
8306.76
Explanation:
you just calcuate 8.12 x 1023 and that will give you the answer
Answer:
2.34 %
Explanation:
Since the density of the Jello, ρ = 1.14 g/mL and ρ = m/v where m = mass of jello and v = volume of jello = 475 mL.
So, m = ρv
substituting the values of the variables into the equation, we have
m = ρv
m = 1.14 g/mL × 475 mL = 541.5 g
Since we have 13 g of sugar in the jello, the total mass present is 13 g + 541.5 g = 554.5 g
So, the percentage by mass of sugar present % m/m = mass of sugar present/total mass × 100 %
= 13 g/554.5 g × 100 %
= 0.0234 × 100 %
= 2.34 %
So, the percentage by mass of sugar present % m/m = 2.34 %
B) 40.00
C) 160.0
D) 6,400
Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15.
The most abundance isotope is nitrogen-14 because of its stability and resistance to radioactive decay.
Isotopes are variants of a chemical element that have the same number of protons (which defines the element) but a different number of neutrons in their nuclei. This means that isotopes of the same element have slightly different atomic masses. In the case of nitrogen, its three naturally occurring isotopes are nitrogen-13 (N-13), nitrogen-14 (N-14), and nitrogen-15 (N-15).
The abundance of an isotope refers to the percentage of that isotope present in a naturally occurring sample of the element. The different isotopes of an element are usually found in different proportions, and the most abundant isotope is the one that appears most frequently in nature.
Nitrogen Isotopes:
a) Nitrogen-14 (N-14):
Nitrogen-14 is the most abundant isotope of nitrogen. It has 7 protons and 7 neutrons in its nucleus. N-14 makes up about 99.63% of naturally occurring nitrogen. This high abundance is primarily due to the relatively stable nuclear configuration of N-14, making it less prone to radioactive decay.
b) Nitrogen-15 (N-15):
Nitrogen-15 is the second most abundant isotope of nitrogen. It has 7 protons and 8 neutrons in its nucleus. N-15 makes up a much smaller percentage of naturally occurring nitrogen, around 0.37%. While N-15 is less abundant than N-14, it is still significant and plays a role in various scientific and environmental studies.
c) Nitrogen-13 (N-13):
Nitrogen-13 is the least abundant of the three naturally occurring nitrogen isotopes. It has 7 protons and 6 neutrons in its nucleus. N-13 is radioactive and is not as stable as N-14 and N-15.
The higher abundance of nitrogen-14 can be attributed to its relative stability compared to the other isotopes. The number of neutrons in an isotope's nucleus affects its stability, and N-14 has a balanced number of neutrons to maintain its stability. This stability prevents it from undergoing radioactive decay at a significant rate, allowing it to persist in higher proportions in nature.
To know more about isotopes here
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Explanation:
Nitrogen-14 is the most abundant isotopes of Nitrogen.