Protons and neutrons have Mass .......... .... wwwww less O equal O high O Other O specific metal has an atomic weight of 180 g/mol and density of 16.6 g/cm3. It has a BCC structure. Find the atomic radius of metal.

Q: 13. State the periodic law, and provide at least two examples to illustrate its meaning.

A: Answer: To study the properties of the elements they are arranged in a table called as periodic…

Q: ö: j y- :0 :0 :0= :o:

A:

Q: Which of the following pairs of elements would you expect to have the most similar atomic radii? O…

A: Trend followed : Atomic radii decreases across the period from left to right and increases down the…

Q: 55. Which elements are main-group elements?(a) Te(b) K(c) V(d) Re(e) Ag

A: The main- group elements are the elements in the s-block and p-block of the modern periodic table…

Q: Which of the following atom does belong to lanthanide group? Group of answer choices A.) U: Z = 92…

A: Given :-  A.) U: Z = 92 B.) Hg: Z = 80 C.) Ce: Z = 58 D.) Cs: Z = 55    To identify :- a…

Q: Write the condensed ground-state electron configuration for each of the following elements

A: Electrons are filled in the sub-shells in increasing order of their energy i.e. lower energy…

Q: A. A main group element with the valence electron configuration 3s1 is in periodic group? It forms a…

A: According to octet rule, a element or ion is stable enough when it has its octet completed. i.e. 8…

Q: Q3. What volume of 8 M sulfuric acid must be used to prepare 1.5 Lof a 0.10 M H,So, solution? A.…

A:

Q: For the following electron configurations choose 3 possible elements (or ions) they may represent:…

A: Isoelectronic species are known as atoms or ions that have the same number of electrons. In…

Q: Write the atomic configuration of these elements a. K-19 b. Sb-51 c. Cu-29 d. Xe – 54 e. U – 92

A: The electrons can be arranged into different shells K, L, M, N and so on. Where K is the shell with…

Q: This ene., Jiagram shows the allowed energy levels of an electron in a certain atom. (Note: the SI…

A: The ground state of an electron is the minimum energy state that it can occupy.

Q: Write the atomic configuration of these elements. w solution Cu-29 Xe – 54 U – 92

A: Cu means copper. It has 29 electrons in it. According to aufbau principle - the lower energy levels…

Q: A. A main group element with the valence electron configuration 3s23p3 is in periodic group .It…

A: a monatomic ion with a charge of:

Q: Which element is below is not classified as a lanthanide or actinide a. Ceb. Smc. ud. Fre. All…

A: The objective of the question is to identify the element that is not classified as a lanthanide or…

Q: Which atom as the largest atomic radius? O a. Cs O b. Li О с. F O d. Zn О е. Mg

A: Atomic radius is the distance in an atom from nucleus to its outermost orbital. We have to find out…

Q: 4. Use short notation to write the electron configuration of: A) Se B) Te-2

A: Electrons are filled in a different atomic orbital in an atom. According to the Aufbau rule, the…

Q: A. A main group element with the valence electron configuration 4s°4p* is in periodic group It forms…

A: The group number of an element can be determined by the valence electron configuration. The group…

Q: A. A main element with the valence electron configuration 5s- is in periodic group group It forms a…

A: When an atom excepts electrons, it acquires a negative charge whereas when an atom loses electrons…

Q: ca page prinis Atomic Structure Who Am I? Bohr's Model 00 (c) 2017 Activities To Teach.com-Updoted…

A: For the identification of atom, calculate the number of protons and number of electrons in the atom…

Q: Give answers of the following. a. Which halogen is used for treating domestic water supplies and…

A: Chlorine(Cl) is used for treating domestic water supplies and swimming pool water. Chlorine is added…

Q: The spheres below represent atoms of Li, Be, B, and F (not necessarily in that order) r- 112 pm r-83…

A:

Q: 67.)Which of the following elements has the highest ionization energy? a. K b. Ca c. Rb d. Sr

A: Ionization energy is the minimum energy required to remove an electron from outer most shell in its…

Q: A. A main group element with the valence electron configuration 4s24p5 is in periodic group It forms…

A:

Q: Which of the following is the correct electron configuration of Mg2+? A.  1s22s22p6 B.…

A:

Q: Which ion has the largest radius? Ca*2, Ca*1, Br", K* O A) Br O B) Ca+1 O C) K* O D) Ca+2

A: Given, Ca2+ , Ca+ , Br- & K+ we know that: Atomic/ ionic radius increases down the group in…

Q: 8. lonization of which of the following elements is most energetically costly? A. Ne В. Na1+ C. Mg2+…

A: Ionization energy is the energy required to remove an electron from the outermost shell of an…

Q: Which of the elements listed below has a lower ionization energy? Strontium Silicon

A: Ionization energy is the energy required to eliminate one electron from the valence shell from an…

Q: Te?-. Smallest radius Largest radius

A:

Q: + will ▬▬▬ D. The following elements also do not follow the diagonal rule. Predict their electron…

A: Filling of electrons in atomic orbital follow Aufbau principle.  It states that electrons are filled…

Q: The Periodic Table lists all the known elements. Elements are arranged in order of ....... 1 .......…

A:

Q: Considering periodic trends, valence electrons in which of the following atoms experience the…

A: The elements given are B, C, Cl, Ne, and F.

Q: Which of the elements listed below has a lower ionization energy? * Oxygen Carbon

A: Oxygen and Carbon have 6 and 4 electrons in their outermost orbit. The nuclear charge of the atoms…

Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.