Section 3.3) 18 Look at the periodic table and tell how many electrons are in the valence shell of the following elements: a. element number 54 b. the first element (reading down) in group VA(15) c. Sn d. The fourth element (reading left to right) in period 3

Q: Potassium naturally consists of 93.10% K-39 and 6.9% K-41. Calculate the atomic mass for Potassium.

A: Given that, % abundance of K-39 = 93.10 % = 0.9310  % abundance of K-41= 6.9 % = 0.069  Then,

Q: According to Coulomb’s law, what happens to the potential energy of two oppositely charged particles…

A: What happens to the potential energy of two oppositely charged particles as they get closer…

Q: How was the overall charge distributed in the plum pudding model?

A: The overall charge is evenly distributed in the plum pudding model.

Q: The metals belonging to Group 1A form ions with a charge of ...

A: Group 1A elements -> Hydrogen, Lithium, Sodium, Potassium, Rubidium, Cesium & Francium. All…

Q: Use the data in the table about Element "X" to answer questions 8-10. Isotope X-38 Percent Abundance…

A: Here we are using basic concept of chemistry

Q: Calculate the average atomic mass of Ga. Naturally occurring Ga is composed of 60.0% 69 Ga, that has…

A:

Q: Answer the following questions about Rare Earth Elements:     a. List the Lanthanide and Actinide…

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Q: The explosion of an atomic bomb in the atmosphere releases many radioactive isotopes into the…

A: The explosion of atomic bomb occurs as a result of rapid release of energy from a high speed nuclear…

Q: When two oppositely charged atoms are attracted to one another they form a ____________________.

A:

Q: How did Mendeleev come up with the first periodic table of the elements?   A:He estimated the number…

A: To explain: How did Mendeleev come up with the first periodic table of the elements.

Q: 2.2 Rhenium (Re) occurs naturally in two distinct isotopes, 185 Re and 187 Re, with an average…

A:

Q: 4. Two elements are studied. One has atomic number X and one has atomic number X- 2. It is known…

A: Two elements are studied. One of the element X belongs to alkali earth metal. The other element has…

Q: Fluorine has an atomic weight of 19 an atomic number of 9. How many electrons are in an ion with a…

A:

Q: be oimilar to olicon. 3. Look up the average atomic masses and the three properties of silicon, Si,…

A: Periodic properties of elements:

Q: In general, atomic masses increase as you move across a row or down a column. This was one of the…

A: Given: Mendeleev periodic table To find: The two elements were placed in order that contradict…

Q: 21. What force holds electrons near the nucleus of the atom? A. Strong nuclear force B.…

A: From the concept of periodic trends of elements and atomic mass of elements the following questions…

Q: 1. To convert 20g of ice at -5oC to 120oC to steam you need __________ cal of energy? Assume…

A: “Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: Determine the balanced reaction of element A (white circles) with element E (gray circles) as…

A: According to the question, wight circles represent element A, gray circles represent element B. From…

Q: Element X is in group 15 on the periodic table. It would form an lon with a charge. :: : + :: : 2 :…

A: Group 15 belongs to the Nitrogen family.

Q: Element X has two stable isotopes: 35X - 75.77%, 34.97 amu 37X - 36.97%, 36.97 amu a.  Calculate the…

A: a) Note : the % you have mentioned for 37X is not possible as total % of both is becoming > 100%…

Q: Part A Given the following: x, X, X, and X. Which are isotopes of each other? x. X. x. and 2x are…

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Q: Prompt:  Jeremy was completing his homework.  His father took a look at his homework and asked him…

A:

Q: Ammonia is a gas with a characteristic pungent odor. It is sold as a water solution for use in…

A: Given information,

Q: Atoms in Element 3 Atoms in Total Atorns Total Atoms in Element 2 Molecule Atoms in Element 1…

A: Molecules are formed by constituent atoms arranged in specific ratio.

Q: According to Dalton's Atomic Theory: I. Chemical compounds are formed when atoms of different…

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Q: Element M reacts with sulfur to form an ionic compound with the formula M2S. Element M is more…

A:

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: Two isotopes of boron are found in nature: 10B has a mass of 10.01 amu, and 11Bhas a mass of 11.01…

A: Given: The atomic mass of 10B, an isotope of boron, is 10.01 amu. The atomic mass of 11B is 11.01…

Q: 1. Johanne Dobereiner noticed that when the elements in the atomic mass, the mass of the middle…

A: As you have posted a question with multiple parts, we will solve the first three subparts for you.…

Q: The natural isotopes of sulfur and their molar masses and mass fractions are respectively 2210S:…

A:

Q: A. Atomic number of Terbium B. Mass number of Carbon C. Element with atomic number 113

A: Given, A. Atomic number of Terbium = ? B. Mass number of Carbon = ? C. Element with atomic number…

Q: 20) Cu²+is an ion of copper. How many nucleons and charged particles are present in the ion? A.…

A: Nucleon is the collective term for protons and neutrons. Nucleons are the particles found in the…

Q: It atom lose two electrons what charge will it have

A:

Q: ead about Eu. What does its symbol stand for? What is its atomic number? How is it produced? Boron…

A: Eu is an f-block element in the periodic table in the lanthanoid series. Note: As per the…

Q: Mass #: sum of protons (+) and neutrons Net Charge: difference between # of protons (+) and # of…

A: Given table is represented as follows:

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: 46. The diagram at the right represents two adjacent atoms of sulfur. The measure ôf distance o yasl…

A: As per rule only the first question can be answered: Solution to Q 46) The covalent radius of S (rS)…

Q: MCQ 17: By chemical means, chemical elements cannot be broken down into A. metals B. non-metals C.…

A: Element is the pure substance that contains atoms of single type.

Q: The element gallium has two naturally occurring isotopes, gallium-69 (68.9256 amu) and gallium-71…

A: Given , two isotopes of gallium (Ga) are 69Ga = 68.9256 amu 71Ga = 70.9247 amu  Let, % abundance of…

Q: The element is part of teeth and bones and is also used in production of blood substitutes in…

A:

Q: 7. During reactions, the element Na gives up one of its electrons to become the cation, Na+. Which…

A: Given,  Na+

Q: Which pair of elements do you expect to be the most similar? a. Molybdenum and Tin b. Nitrogen and…

A: Given,  a. Molybdenum and Tin  Electronic configuration of Mo = [Kr]4d55s1  Electronic configuration…

Q: 36. Why are atoms electrically neutral? * a. They have the same number of protons and neutrons which…

A: Concept:  Atomic structure: Atoms consist of three basic particles: 1. protons 2. electrons 3.…

Q: Models neutrons can are be used to show the structure of an atom, The protons and clustered aroUnd…

A: The element which was shown in the given model has to be identified.

Q: Consider generic atoms A, Be C. It is known that the mass number of A is equal to 101, the mass…

A: The atoms which have the same number of the proton but the neutron number is different is called…

Q: 1. Consider a neutral atom, the atomic number is equal to (a) mass of neutron (b) number of proton…

A: Atomic number depends on proton number

Q: A helium atom consists of two protons, two electrons and Iwo neutrons. In the helium atom, the…

A:

Q: Boron consists mainly of 19.9% boron-10 and 80.1% boron-11. What is the average atomic mass (amu) of…

A: The average Atomic Mass of Boron is given by -

Q: 12 What is the difference between sulfate and sulfite? a) There is no difference, the are the same…

A: Chemical formula of sulfate is   SO42-  Chemical formula of sulfite is  SO32-    Correct answer is…

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.