Answer:
No we cannot measure absolute energy states.
Explanation:
The absolute energy state means the internal energy of any molecule, either reactant or product. We cannot measure the internal energy of any reactant or product as internal energy or absolute energy is sum of all kind of energy including kinetic energy, vibration energy etc.
However we can measure the changes in these energy during any chemical process.
Answer:
The kinetic energy of a 4 kg mass moving at 3 m/s is 18 joules.
Explanation:
The kinetic energy (KE) of an object is calculated using the following formula: (image inserted)
Where:
KE: is the kinetic energy
m: is the mass of the object
v: is the velocity of the object
In your case, the mass (m) is 4 kg, and the velocity (v) is 3 m/s. Plugging these values into the formula.
The unit of kinetic energy is the joule (J), which is equivalent to a kg m^2/s^2. So:
KE = 18 J
nitrogen (N)
lithium (Li)
bromine (Br)
potassium (K)
Answer: Potassium (K) has the lowest electronegativity among the given elements.
Explanation:
Electronegativity is a measure of an element's ability to attract electrons towards itself when it is involved in a chemical bond with another element. Potassium has the lowest electronegativity because it has only one valence electron that is located far from the nucleus, making it easier to lose that electron and become a positively charged ion. In contrast, nitrogen, lithium, and bromine have higher electronegativities because they have more valence electrons or the valence electrons are closer to the nucleus, making it more difficult to remove or share electrons.
The element with the lowest electronegativity among the given options is potassium (K). Potassium has an electronegativity value of approximately 0.82 on the Pauling scale, which is the lowest value among the four elements listed. In contrast, nitrogen (N) has an electronegativity of approximately 3.04, bromine (Br) has an electronegativity of approximately 2.96, and lithium (Li) has an electronegativity of approximately 0.98. Electronegativity is a measure of an atom's ability to attract electrons towards itself in a chemical bond. The lower the electronegativity value, the less the atom attracts electrons towards itself.
Brainliest?
Answer:
A. 120m
Explanation:
just took the test
Answer: Electrons
Explanation: In chemical reactions, elements and compounds change in order to form different substances. This changes can be:
1. oxidation state: which is define as the charge of the atom
2. bonding: atoms in a compound are bonded, this bonds can break so atoms rearrange to form different substances
In this changes electrons are involve. The charge depends on the amount of negative charge of electron respect to positive charge of proton in nucleus which remain the same, otherwise we would be talking about nuclear reactions.
Also, bonding depends on the electrons that atoms can give, receive or share to form ionic or covalent bonds.