(a) Complete the table for some of the elements in Period 3 group number IV VII V VI symbol Si Na Mg Al CI number of valency electrons valency

Q: arrange the elements in order of increasing ionization energy: Li Ca Mg O N

A:

Q: Which of the following ions is isoelectronic to Ne? O-2 OF-2 K+ O Al+2 None of these

A: Isoelectronic species(moreover, 'Iso' means same and 'electronic' means electrons) are those species…

Q: Which element in the 2nd period would have the largest difference in energy between its 4th and 5th…

A: we have to select the element for which difference in 4th and 5th ionization energy is very large

Q: atom of which of the following elements has the largest ionization energy? Sb As Ві P N

A: Ionization enthalpy of 15th group elements. Nitrogen has high ionization enthalpy. N = 1402 ,P=…

Q: Arrange each group of anions in order of increasing ionic radius. 7A 8A 1A 3A 4A SA 6A H He Each…

A: To explain: We have to explain the trend for atomic radius.

Q: P 00 R Consider an ionic compound, MX, composed of generic metal M and generic, gaseous halogen X. •…

A: To solve this problem we will use Born Haber cycle . .

Q: Why it is possible to determine the charge of monoatomic ions from their position on the periodic…

A: It is fairly easy to work out those for monatomic ions in the s and p blocks of the periodic table.…

Q: Which of these is the smallest? Arsenic Selenium Bromine Krypton Iodine

A: Answer:- This question is answered by using the simple concept of variation of atomic size across…

Q: Which ions have the same number of electrons as an atom of krypton Se^2- As^3- Ca^2+ K+ Which…

A:

Q: Determine the identity of each element based upon the following data. Period 3 element with the…

A: The given IE value(s) : IE IE value (kJ/mol) IE1 578 IE2 1817 IE3 2745 IE4 11575 IE5…

Q: Predict the ionic charge for a phosphorus ion, P?–, based on the position of the element in the…

A: Predict the ionic charge for a phosphorus ion, P?

Q: Effective nuclear charge of: 3p electrons in chromium 3s electrons in cobalt 2s electrons in…

A: Zeff can be calculated by slaters Rule in any element .          Formula for Zeff   = atomic Number…

Q: 2. The elements vary from metals through metalloids to nonmetals. They form halides in oxidation…

A: Given, The elements of the unknown group contains metals, metalloids and non metals. The halides of…

Q: B Na,S O,

A: 6) To write net ionic equation, follow the below mentioned steps: 1)Write balanced chemical…

Q: Which of the following elements would you expect to have the highest ionization energy? Pb Ge Cs…

A:

Q: Which of the following atoms have the least metallic character Li Cs Rb K Na

A: We are to find the element with least metallic character among the given Li Cs Rb K Na

Q: Choose the compound from the list below. magnesium water neon helium O lithium

A: Given options:  magnesium water neon  helium lithium We have to find the compound from the above…

Q: have varied physical properties and are found in many different compounds. Nonmetals Metals…

A: Most of the elements (93 elements) of the periodic table are metallic. Some elements present on the…

Q: Arrange the following elements in order of increasing ionization energy (lowest first). = Mg = Al =…

A: Ionisation energy is defined as the energy needed to remove the outermost electron from any isolated…

Q: Considering only ions with charges of +1, +2, -1 and -2, or neutral atoms, give the symbols for 4…

A: Ans Cs is a group 1 metal. It contains 55 electrons when neutral. A Cs atom loses one electron to…

Q: Which neutral atom is isoelectronic with O2+? neutral atom:

A: The atoms, ions or molecules  have same number of electrons is called isoelectronic.

Q: ) Based on their positions in the periodic table: What is the most likely charge of a magnesium…

A: We know that, Mg is in belong to Group 2 and O belong to group 16.

Q: How many core electrons are in N-2?

A: Given :- Atomic symbol = N-2  To find :- number of core electrons  Atomic number of N = 7

Q: Which of the following elements has the smallest first ionization energy? A) S B) O C) Si D) Sr E)…

A:

Q: Which atom has the smallest atomic radius P CI Si S How many protons neutrons and electrons does the…

A: the detailed answer is attached below.