Answer: D) Petroleum Jelly
Explanation: Petroleum jelly is also known as white soft paraffin or Vaseline. It's a semi-solid mixture of hydrocarbons that can be used as a lubricant and protective ointment for dry or chapped skin. It can also be used to protect against minor cuts and burns.
Answer:
K < Fe < Br < Kr
Explanation:
Given chemical elements;
Potassium
Iron
Bromine
Krypton
Problem; arrange in order of increasing electronegativity
Solution:
The electronegativity of an element measures the relative tendency with which the atoms of the element attracts valence electrons in the chemical bond.
To solve this problem, we are going to use values of electronegativity from the Pauling's electronegativity table of elements;
For;
Potassium = 0.8
Iron = 1.83
Bromine = 2.8
Krypton = 3.0
So;
K < Fe < Br < Kr
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
#SPJ3
Explanation:
Nitrogen-14 is the most abundant isotopes of Nitrogen.
B. They knew the Ba'ath Party was responsible for the attacks.
C. They knew that Afghanistan was harboring Osama bin Laden and other members of al-Qaeda.
D. They knew that Afghanistan was building a nuclear arsenal and planning to use dirty bombs on the U.S.
The answer is C. They knew that Afghanistan was harboring Osama bin Laden and other members of al-Qaeda.
Mg3 N2 how do I get my answer
The Lewis dot structure for Mg3N2 represents the ionic bonding between magnesium and nitrogen. Each magnesium atom donates its 2 valence electrons to nitrogen, as represented by zero dots around each Mg and eight around each N.
The student is asking about the Lewis dot structure of Mg3N2, which is commonly known as magnesium nitride. The Lewis dot structure is a graphical representation of the molecule that shows how the electrons are arranged among the atoms of the molecule.
To draw the Lewis dot structure for magnesium nitride, follow these steps:
This process represents the Ionic bonding in Mg3N2.
#SPJ6