is Ho and Cf in group 13 of the periodic table?

Q: Describe the development of the Periodic Table?

A: Modern periodic table is made by Dmitri Mendeleev and Lothar Meyer. This modern period law states…

Q: Assign reason to the following :(i) Noble gases have large positive values of electron gain…

A: Given statements, (i) Noble gases have large positive values of electron gain enthalpy.(ii) Helium…

Q: The formula of magnesium oxide is = MgO But a student determined experimentally that the formula of…

A: The two possible reasons for the incorrect determination are given as follows:

Q: The oxygen and nitrogen families have some obvious sim-ilarities and differences.(a) State two…

A: a) In group 5A (15) and 6A (16), the elements are range from gas metalloid to metal. Thus, their…

Q: Element X reacts with chlorine to form an ionic compound that has the formula XCl2. To which group…

A: Formula   = XCl2 Group Number of X = ?

Q: 1 B,0, + 3 Mg → 3M9O + 2 B 5. (a) How many grams of boron can be obtained from 10.00g of B,0,? (b)…

A: Given balanced equation is as follows. 1B2O3+3Mg→3MgO+2B

Q: List the properties of Oxygen?

A: The elements of group 13 to 18 in the long form periodic table form the p-block elements. They have…

Q: In contrast to sodium, why would calcium, with two electrons in the outer shell, react with two…

A: A bond is an attractive force between any two entities. It can be covalent, ionic, coordinate, etc.…

Q: Which of the following statement is untrue regarding halogen? Can exhibit multiple oxidation state…

A: Group 17th or the second last group of the periodic table is known as the halogen group.

Q: Give the noble gas shorthand notation (ex: [He] 2s2 2p1) for U+2

A:

Q: babob D. O=PIO

A: C) The given chemical structure is a carbohydrate polymer.             D) The given chemical…

Q: Chemical formula of NH4+ and PO43

A: We have to write the chemical formula of NH4+ and PO43-.

Q: The oxygen and nitrogen families have some obvious similarities and differences.(a) State two…

A: We only answer up to 3 sub-parts. Please resubmit the question with other sub-parts (up to 3) for…

Q: Explain the organization of an atom of carbon.

A: The protons, neutrons, and electrons are the salient features of an atom. The protons present in the…

Q: What is the electron configuration of Al 3* ?

A: Given :- ionic symbol = Al3+  To determine :- its electron configuration

Q: Which would be the correct chemical formula for Li(1+) and S

A: Applying concept of formula formation by valency of element.

Q: MCQ 108: The highly reactive element which can burn glass, metals, and water in a stream of gas is…

A: Reactivity of non metals is majorly determined by their reduction potentiol.

Q: Why would you say that Space Shuttles rather use hydrogen as its primary fuel source?

A: The Space Shuttle was a partially reusable low earth orbital spacecraft system.  It is operated by…

Q: give any one example of isodiaphers

A: Isodiaphers:The atoms which are having different atomic number and mass number but same difference…

Q: How does the ground temperature in sunlight with CO2 compare with ground temperature in sunlight…

A: Given : To explain effect of CO2 on temperature of earth.

Q: If X is in the period 5, the ion formed has the same electron configuration as the noble gas

A: From the given Lewis diagram, we can see that there is only 1 valence electron in the element  And…

Q: Which has the lowest albedo value? O ice O land other ocean Which of the following are examples of…

A: Albedo value is the measure of reflectivity of surface. Albedo generally represents the whiteness of…

Q: Potassium iodide (KI) exhibits predominantly ionic bonding. The K+ and I− ions have electron…

A:

Q: What is a valence shell?

A: In chemistry, the term electron shell also known as the principal energy level refers to the orbit…

Q: Identiry the IEg and IE4. O boron O oxygen O beryllium

A: Berylium Period 2 elements are Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon.…

Q: OWLV2 | Online teaching and lea: X O Periodic Table Bb Intellectual and Industrial Revolu X…

A:

Q: 5 ,CO,, Be H,, PE examples: CH

A: Given Question answer is as follows first 3 according to our guidelines.

Q: 2. Tonization energy measurements are usually carried out with atoms in th gaseous state. Why? The…

A: Ionization energy is defined as the energy required to remove one electrons form an atom in gaseous…

Q: What is the greenhouse effect? How does the excess  CO2 gas in the atmosphere cause the greenhouse…

A: The warming of the earth's surface due to the accumulation of some gases in it is known as…

Q: Write a 3 paragraph form introduction about group 3 cations

A: ations are typically divided into Groups, where each group shares a common reagent that can be used…

Q: What is the electron configuration of Ar (argon)?

A:

Q: сH, (сн), сн, 0) + о, (e) - со, (8) + н,о(з) co,(g) + H,0(g) 5

A:

Q: What do the elements sulfur (S), nitrogen (N), phosphorus (P), and bromine (Br) have in common? A.…

A: The elements Sulfur(S), nitrogen(N), phosphorus(P), and bromine(Br) all situated on the right-hand…

Q: The correct chemical formula for the combination of Ca2+ and PO43- is:

A: The combination of  Ca2+ and PO43-    :

Q: A model for BeBr, is

A:

Q: ) Nao 2. Br 3) H3ot, D 3 4 3 O 1 0 4 O 2

A: Given reaction,

Q: What are the family names for groups 3A, 4A, 5A, and 6A on the periodic table.

A: The family names for groups 3A, 4A, 5A, and 6A on the periodic table are given in step two.

Q: what is the lewis dot structure of nitrogen?

A: In Lewis dot structures, valence electrons are represented in the form of dots.

Q: What is the electron configuration of Ne2?

A: Electronic configuration is defined as arrangement of electrons in shell, subshell and orbitals.

Q: MCQ 36: Halogen that can react with noble gases like Xe is A. F B. CI C. Br D. I

A: Noble gases are those element which have complete octet i.e., they have 8 electrons in their valence…

Q: What is the number of electrons for AsBr5?

A: Arsenic consists of 33 electrons and its electronic configuration is 2,8,18,5. So, its valence shell…

Q: The bond between calcium and chlorine is:

A: The bond which is formed by positive and negative ions are known as ionic bonds.

Q: Why are Na+ and K+ unable to form covalent bonds?

A: Since these ions are formed from Na and K metals after donating the valence shell electron. Now they…

Q: Which of the following gases contain a halogen? O HS O NO, O He O Co O HCN O HF O CI, O N,O Ar o, Ne…

A: According to the periodic table, halogens are members of group 17 .  Elements of halogen groups are…

Q: Explain the nature of Carbon monoxide ?

A: Carbon monoxide is a toxic gas with the chemical formula of CO. It has a molecular weight of 28…

Q: The upset caused in the natural balance of concentration of greenhouse gases is called O A polution…

A: The upset caused in the natural balance of concentration of greenhouse gases is called global…