Helppp it duee by end of class!
Answers
Answer:
Nitrogen atom (neutral)
- Atomic number: 7
- Atomic mass: 16
- #protons (+): 7
- #neutrons: 9 (Atomic mass - Atomic number)
- #electrons (-): 7
- Overall charge: 0 (neutral atom has equal number of protons and electrons)
- Electron configuration: 1s² 2s² 2p³ (two electrons in the 1s orbital, two electrons in the 2s orbital, and three electrons in the 2p orbital)
Nitrogen ion
- Atomic number: 7
- Atomic mass: 16
- #protons (+): 7
- #neutrons: 9 (Atomic mass - Atomic number)
- #electrons (-): 10 (one additional electron)
- Overall charge: -1 (negative ion, gained one electron)
- Electron configuration: 1s² 2s² 2p⁶ (two electrons in the 1s orbital, two electrons in the 2s orbital, and six electrons in the 2p orbital)
The atomic mass of #1 (neutral nitrogen atom) and #3 (nitrogen isotope) are different because they have different numbers of neutrons. The neutral nitrogen atom has 9 neutrons, while the nitrogen isotope has 9 neutrons. The electron configuration of #1 (neutral nitrogen atom) and #2 (nitrogen ion) is different because the nitrogen ion has gained one extra electron. The extra electron occupies an available space in the 2p orbital, resulting in a different electron configuration.
Diagram #2 is considered an ion because it has a different number of electrons than the neutral nitrogen atom. The nitrogen ion in diagram #2 has 10 electrons, one more than the neutral nitrogen atom. It is a negatively charged ion (-1) because it has gained one electron. This type of ion is called a nitride ion. The number at the end of the nitrogen isotope's electron configuration represents the number of electrons in the outermost energy level or shell. For nitrogen, the number at the end is 5, indicating that it has 5 electrons in its outermost shell.
Explanation:
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Related Questions
Which of the following is NOT a clue that a chemical change has occurred?a. change in colorb. production of a gasc. formation of a precipitated. change in shape
5. Given the following equation: 8 Fe S8 8 Fes, what mass of iron is needed to react with16.0 grams of sulfur? How many grams of FeS are produced?
What is the hydronium ion concentration of a solution whose pH is 12.40?
What is the role of microbes in maintain temperature on earth? (Role of microbes in CO2 and CH4recycling)
B- greater thermal conductivity
C- greater thermal insulation
D- a higher R-value
Answers
Answer: The correct answer is "greater thermal conductivity".
Explanation:
Thermal conductivity: It is a ability to conduct heat. Heat transfers occur at a lower rate to material at higher thermal conductivity.
It is defined as the rate at which the heat is transferred through a unit thickness of the substance per area per change in the temperature.
In the given problem, A piece of wood and a piece of steel are at the same temperature. However, the steel feels hotter. The thermal conductivity of the steel is more than the thermal conductivity of the wood.
Therefore, the correct option is "greater thermal conductivity".
B- Greater thermal conductivity
c=299,792,458
f=2x10to the 12th Hz
lambda=c/f
how do I solve this?
Answers
Answers
What is involved in redox reactions
A.the transfer of electrons between reactants
B.the bonding of ions to form chemical compounds
C.the addition of water to break down food macromolecules
D.the breaking down of water into hydrogen and oxygen atoms
Answers
Answer:
A
Explanation:
Redox reactions are comprised of two parts, a reduced half and an oxidized half, that always occur together. The reduced half gains electrons and the oxidation number decreases, while the oxidized half loses electrons and the oxidation number increases.
Answer:
a
Explanation:
B. Drying wood in a shed
C. Melting ice to obtain water
D. Evaporating alcohol into vapor
Answers
Coal combustion causes a chemical change. Burning coal in a furnace will result in a chemical change. Therefore, option A is correct.
What is chemical change ?
A chemical change is the transformation of one material into another, the formation of new materials with different properties, and the formation of one or more new substances. It occurs when one substance reacts with another to form a new substance.
Coal combustion causes a chemical change. The main component, carbon, is converted to carbon dioxide when coal is burned. This process is irreversible.
When carbon is burned, it produces carbon dioxide, and hydrogen produces water. Each of these reactions generates a different amount of heat. Because this process cannot be reversed, coal combustion is a chemical change.
Thus, option A is correct.
To learn more about chemical change, follow the link;
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a. the concentration of b-galactosidase
b. the concentration of Luria Broth
c. the concentation of glucose
d. the concentration of lactose
e. the concentration of ONPG
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Answers
Answer:
a. The concentration of β-galactosidase
Explanation:
β-Galactosidase is an enzyme that hydrolyzes ß-D-galactosides like lactose to glucose and galactose.
It also cleaves o-nitrophenyl-β-D-galactoside (ONPG) to yield galactose and o-nitrophenol, which is yellow, and can be measured by its absorption at 420 nm.
If the concentration of ONPG is greater than that of β-galactosidase, the concentration of o-nitrophenol produced is proportional to the concentration of the enzyme.