Which of the following Group 2 elements has the lowest first ionization energy?(1) Be (3) Ca
(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.
Learn more about ionization energy, here:
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OXIDATION IN Cl2(aq) + 2Brmc003-1.jpg(aq) mc003-2.jpg 2Clmc003-3.jpg(aq) + Br2(aq)
In what way is iron unique among the elements?
B.) 0-14
C.) 1-14
D.) 1-12
Answers
-log[H+ ] + -log[OH- ] = -log[10-14]
pH + pOH = 14
So pH = 14 – pOH and pOH = 14 – pH
the correct answer is B.) 0-14
Answers
Answers
Answer: The theories are such that if any chemical produce H+ ion then it is an acid and if the chemical produces OH- ion then it's a base.
Explanation:
sorry I am not that much knowledgeable like all of you
Answers
Answer:
Copper (I) carbonate or cuprous carbonate.
Explanation:
Hello,
In this case, by considering the given formula, we identify the copper's oxidation state as +1 since the carbonate anion is -2 and copper's subscript is 2, therefore +1 is its oxidation state. On the other hand, carbon's oxidation state in CO₃⁻² is +4, that is why according to the IUPAC rules, its name is carbonate. Thus, one sums up that the chemical name of the given compound is copper (I) carbonate or cuprous carbonate.
Best regards.
Answers
Answer:
true
Explanation:
(2) The gas particles have no attractive forces between them.
(3) The gas particles are larger than the distances separating them.
(4) As the gas particles collide, the total energy of the system decreases.
Answers
Ans: (2) The gas particles have no attractive forces between them.
The kinetic theory explains the behaviour of a hypothetical ideal gas. It explains pressure in terms of the collision of gas particles against the walls of the container which it occupies.
The kinetic theory of gases is based on three main postulates:
1) The collision between gas particles is elastic i.e. no energy is lost or gained
2) The gas particles are treated as point masses i.e. the volume occupied by the gas particles is negligible when compared to the volume of the container
3) There are no attractive or repulsive forces between particles.
The statement that describes the particles of an ideal gas, based on the kinetic molecular theory is .
Further Explanation:
Kinetic theory of gases depicts gas as a large number of particles that are in continuous random motion. It explains the macroscopic properties of gases by taking into account their molecular composition and motion.
Postulates of kinetic theory of gases:
i) The gas molecules are very small and are located far apart from each other. Most of the volume occupied by the gas is an empty space.
ii). The molecules of the gas are in rapid random motion. These can move in all directions.
iii). The gas molecules undergo collisions with each other and with the walls of the container. The collisions between molecules and container walls are responsible for the pressure of the gas.
iv). There is no loss of kinetic energy when gas molecules collide so their collisions are known as perfectly elastic.
v). No interaction occurs between different molecules of gas during collisions.
(1) The motion of the gas particles is orderly and circular.
The molecules of a gas move randomly in all directions so their motion is not orderly and circular.
(2) The gas particles have no attractive forces between them.
The molecules of a gas move randomly in all directions so their motion is not orderly and circular.
(3) The gas particles are larger than the distances separating them.
The particles of gas are very small and are situated far away from each other. So the distance between the particles is larger than their size and not vice-versa.
(4) As the gas particles collide, the total energy of the system decreases.
The collisions of gas molecules are considered to be perfectly elastic. So the total energy of the system remains constant. It neither increases nor decreases.
Therefore option (2) describes the particles of an ideal gas on the basis of the kinetic molecular theory.
Learn more:
- What is the kinetic energy of electrons? brainly.com/question/5031462
- Which statement is true for Boyle’s law: brainly.com/question/1158880
Answer details:
Grade: High School
Subject: Chemistry
Chapter: Ideal gas equation
Keywords: collisions, gas, random motion, kinetic energy, perfectly elastic, interaction, container, kinetic theory of gases, volume, motion, orderly, circular, decreases.