What is the predicted order of first ionization energies from highest to lowest for lithium (Li), sodium (Na), potassium (K), and rubidium (Rb)?
Answers
Answer;
From highest to lowest is Li>Na>K>Rb.
Explanation;
- Ionization energy is the energy that is required to dislodge or remove an electron from the outer most energy level or energy shell. The first ionization energy is the energy required to remove the first electrons from the outermost energy shell.
- Lithium will have the highest first ionization energy, as the outer electron is closer to the pull of the nucleus and not shielded by full shells. This means that rubidium will be the lowest.
Answer;
From highest to lowest is Li>Na>K>Rb.
Explanation;
- Ionization energy is the energy that is required to dislodge or remove an electron from the outer most energy level or energy shell. The first ionization energy is the energy required to remove the first electrons from the outermost energy shell.
- Lithium will have the highest first ionization energy, as the outer electron is closer to the pull of the nucleus and not shielded by full shells. This means that rubidium will be the lowest.
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How many additional electrons can fit into the n = 3 shell of sulfur ?
A bike tire contains a fixed amount of gas at a constant pressure. Initially, the tire contains 4.00 iters of air at 26 degrees Celsius. When the temperature drops to 22 degrees Celsius, the volume of the bike tire will decrease to 3.95 liters.TRUEFALSE
Which cell is an animal cell
Answers
35 kL (1000 liters/ 1 kL) (1 x 10^6 mL/ 1 L) = 3.5 x 10^9 microliters
Answers
Answer : The correct option is, (2) 10 g of water at 55°C
Explanation :
Average kinetic energy of the gas particle is directly proportional to the temperature of the gas particle.
Formula used :
where,
R = Gas constant
T = temperature
= Avogadro's number
From this we conclude that the kinetic energy is directly proportional to the temperature where 'R' and are constant. That means kinetic energy depends only on the temperature not on the mass.
(Higher the temperature, higher will be the kinetic energy)
Hence, the average kinetic energy of water molecules is greatest in 10 g of water at 55°C.
Final answer:
The sample with the highest average kinetic energy of water molecules is (2) 10 g of water at 55°C.
Explanation:
Kinetic energy is a fundamental concept in physics that describes the energy an object possesses due to its motion. It depends on both an object's mass and its velocity. Objects in motion have kinetic energy, and the faster they move or the more massive they are, the greater their kinetic energy. This energy can be transferred or transformed but is always conserved in a closed system.
The average kinetic energy of water molecules depends on the temperature of the water. The higher the temperature, the greater the average kinetic energy. In this case, the sample with the highest average kinetic energy would be (2) 10 g of water at 55°C. This sample has a higher temperature than the other options, therefore, the water molecules in this sample have the highest average kinetic energy.
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(2) Mg (4) Ba
Answers
Barium (Ba) has the lowest first ionization energy among the given elements of group 2. Therefore, option (4) is correct.
What is ionization energy?
The ionization energy is the minimum amount of energy that is required to knock out an electron in a gaseous atom or ion. Ionization energy can also be used to estimate the strength of chemical bonds and is measured in units of electronvolts or kJ/mol.
Alkaline earth elements can lose both valence electrons to attain a noble gas configuration. So, these elements have two ionization energies. 1st ionization energy of alkaline earth metals is the energy required to remove the first electron from the neutral atom.
With increasing atomic size down the group, the valence electron gets shielded by the inner electrons. So they can easily be removed with less energy. Hence the first ionization energy of group 2 elements decreases with an increase in the atomic number or atomic size.
Therefore, Barium has the lowest first ionization energy.
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Answers
Both the sodium ion and bromine ion are attracted to each other and form an ionic bond. The electrostatic attraction between the ions allows for an ionic bond to form after donation of valence electrons from one atom to another. Ionic structures are usually ionic lattices.
Answer:
bromine is reduced
Explanation:
Works on Gradpoint
two metal anions
a metal cation and a nonmetal anion
two nonmetal cations
Answers
ionic compounds are held together by ionic bonds are formed by the transfer of electrons from a metal to a non metal
Ionic bond is formed by the electrostatic attraction between the oppositely charged ions.
metals give out electrons and becomes positively charged. positively charged ions are called cations. so these are called metal cations
the electrons given out are taken in by non metals and become negatively charged. negatively charged ions are called anions. then they are called non metal anions.
so ionic compounds are formed by the electrostatic attraction between metal cations and non metal anions.
therefore ionic compounds are composed of a metal cation and a nonmetal anion
B. a decrease in greenhouse gases
C. average decrease in the temperatures near Earth's surface
D. a decrease in carbon dioxide emissions
Answers
Answer: The correct answer is A. average increase in the temperatures near Earth's surface
Explanation: The reason this is correct is that global warming is it getting hotter, logically the temperatures near Earth's surface will be getting hotter as well. Hope this helps