Consider the stable elements through lead (Z = 82). Inhow many instances are the atomic weights of the elementsout of order relative to the atomic numbers of theelements?

Q: Given the following information about two elements X and Y of the same group. Element Atomic…

A:

Q: (g) A different element, L, is located in the same row of the periodic table as element E, but L has…

A: (g) The elements L and E lies on the same period.

Q: (1) What is the valence electron configuration for the krypton atom? (2) What is the valence…

A:

Q: Consider this set of successive ionization energies:IE1 = 578 kJ/mol IE2 = 1820 kJ/molIE3 = 2750…

A: Ionization energy refers to the measure of the difficulty to remove an electron from its valence…

Q: Arrange in order of increasing atomic size. (a) the period 3 elements Cl, Na, and Ar (b) the Group…

A: Arrange in order of increasing atomic size. (a) the period 3 elements Cl, Na, and Ar (b) the Group…

Q: Write the electron configuration for each element.(a) Cl (b) Si (c) Sr (d) O

A: (a) The atomic number of chlorine is 17. The electron configuration for chlorine can be written as…

Q: The graph at the right shows the atomic radius for the19 elements in the periodic table.(a) Describe…

A: a.The edge of an atom's orbital determines its size. Orbital boundaries, on the other hand, are…

Q: 6 The elements of the Periodic Table are created by a variety of processes discussed in the…

A: New atomic nuclei create from pre existing nucleons.The first nuclei form after bing bang through…

Q: 7.83 Referring to the periodic table, name (a) the halogen inthe fourth period, (b) an element…

A: Since you have posted multiple sub-parts, the answer for first three sub-parts are given below.…

Q: Some properties of element Y are listed. It reacts with hydrochloric acid to make hydrogen gas. It…

A: 1. Mg +2HCl  → MgCl2  + H2 2. Mg  + H2O → MgO + H2 Magnesium burns in steam to produce white…

Q: What are the properties of the element flerovium (the period 7 element in group 14)?

A: Flerovium Flerovium is an atomic number 114 chemical element with the symbol Fl. Flerovium, which is…

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: imange elements in increasing order t electron affinituy Na, Li, Cs -)I, Br, F ) Na, Li, AI, 0

A: We know in the periodic table, the negative electron affinity increase as we go from left to right…

Q: [CLO-3] Which one of the following groups of elements would be expected to have very similar…

A: 1.The element having similar  outer electronic configuration belong to same group. 2. As outermost…

Q: Which elements are considered to be representative elements?

A: Whole periodic table classified into 3 parts:-  Transition elements  Representative elements…

Q: vi. Answer true or false. (a) Elements in the same column of the Periodic Table have the same…

A:

Q: Consider the elements  Sulfur, Oxygen, Selenium, and Tellurium. 1. The element which has the…

A: The given elements are Sulfur, Oxygen, Selenium, and Tellurium. 1. The element which has the highest…

Q: Which fourth period representative element has the highest atomic number? a)ca b)zn c)pb d)kr

A: From the given elements, representative elements are Ca and Pb. Zinc is a transition element and…

Q: The first member of a group in the Periodic Table of elements always shows some abnormal chemical…

A: Group is a column in a periodic table and in the first element in the column is the first member of…

Q: Discussing this chapter, a classmate says, “Since elementsthat form cations are metals and elements…

A: The given data: The given statement is - Since elements that form cations are metals and elements…

Q: Element "X" reacts with element "Y" to form an ionic compound containing X* and Y2- ions. Write a…

A: To write the molecular formula, crisscross the valences of cation and anion.

Q: There should be 10.07 x 7.395 2.5x0.08 significant figures in the answer to the following…

A: During multiplication and division,  the result is reported in the minimum number of significant…

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: 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: 4 Nitrogen is less reactive than flourine. Why could the effective nuclear charge be used to…

A: Effective nuclear charge is basically the actual nuclear charge faced by the valence electrons. The…

Q: Arrange the following set of elements in order of increasing first ionization energies. Ne N Li B C…

A: Ionization energy: The energy required to remove an electron from its gaseous atom or ion.

Q: Rank the following elements by increasing atomic radius (use > or < as notation).  C, Al, O, K

A: We have to arrange the element in order of increasing radius.

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

A: Since isoelectronic species are those which have same number of electrons Since Kr has 36 electrons…

Q: Arrange the following sets of ions in order of decreasing ionic radii. (a) Br¯, Cl¯, 0², s²- S2- >…

A: Arrange the given ions in order of decreasing ionic radii --

Q: (a) Like first member of other groups, boron also differs from rest of the members of its group.…

A: Boron belongs to group 13 in modern periodic table. Other element of this group are Al,In,Ga etc. In…

Q: Q2. This question is about the periodicity of the Period 3 elements. (a) State and explain the…

A: Answer: Energy required to release the most loosely binded electron in an isolated gaseous atom is…

Q: E is a made up element and contains 6 valence electrons Y is a made up element and contains 7…

A:

Q: separate

A: This question is related to periodic table.

Q: Which element would you expect to have the highest second ionization energy (IE2)?    Na, Mg, Al

A: Now to see the second ionization energy we write the electronic configuration of the elements: Na =…

Q: (1) Give the electron configuration of the element belonging to: a) Group 14 and Period 2 b) Group…

A: Since you have posted multiple question in single session. we are entitiled to answer only first…

Q: Select the ions or atoms from the following sets that are isoelectronic with each other (a) OS O K*…

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

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

A: We know that the Isoelectronic species are those species which have same/equal number of electrons…

Q: A space probe identifies a new element in a sample collected from an asteroid. Successive ionization…

A: The pattern of ionization enthalpy in a gathering is reliant upon the valency of the components…

Q: choose three . What are the characteristerses of a metal like element? (a) they try to get…

A: Since the metals are those elements which has a tendency to lose electron to complete there octet…

Q: Consider the following information. • The lattice energy of CsCl is AHjattice = -657 kJ/mol. • The…

A: Born Haber process or more commonly referred to as Born Haber cycle is a method that allows us to…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.