Since all stars begin their lives with the same basic composition, what characteristic most determines how they will differ?     mass they are formed with     location where they are formed     luminosity they are formed with     color they are formed with     time they are formed

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located In the outer Solar…

A: The isotopes are elements having same atomic number with different mass number, which have same…

Q: which of the following statements is not part of Dalton's original atomic theory?  all atoms of one…

A: According to Dalton's atomic theory, Atoms are indivisible. i.e. there is no subatomic particles…

Q: The mass of 6 million molecules of a diatomic gas is 5.1  × 10-19 kg. What is the atomic mass of the…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: Which process is most responsible for creating the Earth's magnetic field? OA. the movement of the…

A: The Earth's magnetic field is generated by electric currents in the conductive iron alloys of its…

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

A: The atomic mass of N relative to H in a sample of of ammonia contains 7.933 g N and 1.712 g H, it is…

Q: What is the atomic mass of an element? The atomic mass of an element is really the average mass of…

A: The mass of an atom is known as its atomic mass. It is usually expressed in g/mol or u where u is…

Q: Which element has a chemical properties that are most similar to potassium? Cesium Sulfur Nitrogen…

A: The vertical column of the elements which are present in the periodic table is known as groups. Each…

Q: 24 This was used to determine the characteristics of the particles in a cathode ray beam and…

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Q: Variations in average atomic mass may be observed for elements obtained from different sources.…

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Q: 3. Elements are arranged according to various trends, 5 in all, and reactivity. Use information from…

A: Reactivity of elements of periodic table is explained by valence electron,  alkali and alkaline…

Q: Mass of the crucible and cover Mass 34.7816 134.76516 34.7658. After 1ª heating After 2nd heating…

A: A numerical problem based on heating experiment, which is to be accomplished.

Q: Place these atoms in the order of increasing atomic radii: Ca, Mg, P, and Cl. a. Cl < P < Mg < Ca…

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Q: 15- Two compounds formed by iodine and fluorine showed the following data, for a fixed mass of…

A: GIVEN: The mass of I in compound I =  1.0000. The mass of F in compound I =  0.1497. The mass of I…

Q: Given the isotopic data determine the average atomic mass of the element.  1) Show the calculation…

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Q: The identity of a nucleus is determined by its   A. proton #   B. radioactive intensity   C.…

A: Nucleus of an atom contains proton and neutron.

Q: Which of the following elements has its name derived from its property of being slightly magnetic?*…

A: Isotopes are the different forms of an element.

Q: The astronaut then measures the abundance of magnesium on the new planet, obtaining the following…

A: Step → 1Average atomic mass = ∑ (% abundance x mass of isotope 100

Q: A chemical reaction is based on on the enviroment of electrons amongst the reactents involved.now…

A: Modern Periodic table is based on atomic number , that is number of proton in an element .…

Q: have no charge. They are found in the ____________ and provide ____________ or weight to the…

A: An atom contains three subatomic particles. Protons ans neutrons are present in the nucleus a nd the…

Q: On another planet, the isotopes of titanium have the given natural abundances. Isotope Abundance…

A: Titanium is an element which has symbol Ti and atomic number 22. Its atomic weight is 47.867 amu. It…

Q: The hypothetical element Supposium exists in four isotopic forms. These relative masses and…

A: Suppose an element having four Isotope then,     Atomic mass=mass of isotope -1×fraction…

Q: Calculate the atomic mass of the mystery element. This element contains three isotopes having atomic…

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Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

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Q: Amazing news! Chemists have just discovered a brand new element on an asteroid. Calculate the…

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Q: Use the information below to calculate the atomic mass of magnesium. Isotope Isotope Mass (amu)…

A: Given   The atomic mass for magnesium-24 is 23.985 amu and abundance is 78.70. The atomic mass for…

Q: A 15.21 gram sample of iron is heated in the presence of excess fluorine. A metal fluoride is formed…

A: Empirical formula, where all the elements that constituents a compound is represented by their…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Answer :-  R44101u…

Q: 17.The atom can be defined as: a)The smallest particle of matter. b) The particle of the matter…

A: We know that atom can be defined as the smallest particle of an element that keeps all the…

Q: What is used as basis for the better arrangement of elements in the periodic table and the key to…

A: Basis for the better arrangement of elements in the periodic table and the key to the discovery of…

Q: Which of the following statements is correct about the periodic law? *       A. Properties of…

A: Which of the following statements is correct about the periodic law?

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: The data given is,

Q: Of the follOV ng statements Is correct about the periodic law? Properties of elements are periodic…

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Q: Determine the thickness of an aluminum foil in atoms with the following information: Weight: 0.633…

A: Given the volume, we can determine the thickness of aluminum foil.

Q: What is the atomic mass of an element? The atomic mass of an element is really the average mass of…

A: The atomic mass of an element is the sum of protons and neutrons present in the nucleus of atom. It…

Q: ue False Elements of the same group have simīlar physical and chemical properties. There are more…

A: 1.  True. - elements of same groups have similar physical and chemical properties. 2.  False. -…

Q: Which pair of elements do you expect to be most similar in their chemical properties?a) K and Fe…

A: Most similar in their chemical properties

Q: 8) A chemistry student reacts a black metallic element with an element that exists as a bright blue…

A: Hey, since there are multiple questions posted, we will answer one question. If you want answer for…

Q: Consider the following data: isotope                  atomic mass                    abundancy%…

A: ANS. Option B) 31.19 amu

Q: Determine the Mass Percentage of each element in the compound Put the first element in the first box…

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Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Given that: Isotope Mass(amu) Relative abundance 98Ru 97.9 90.3% 99Ru 98.9 9.7%

Q: 5 Elements are -  1) Sodium. 2) potassium 3) calcium 4) magnesium 5)lithium  Rank them from 1…

A: A question based on biological importance of chemical elements that is to be accomplished.

Q: Hydrogen sulfide is a gas with the odor of rotten eggs. The gas can sometimes be detected in…

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Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A:

Q: Percentage Abundance. The element rubidium consists of two isotopes, one having an isotopic mass of…

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Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, Ilocated in the outer Solar…

A: As it is given the mass of isotope and it's relative abundance. So we can easily calculate the…

Q: an element has three isolopes with the Vollowing mass numbers and abundances: 15 amu at 40%. 16 amu…

A: Given :-  I) Mass number = 15 amu      Abundance = 40%  2) mass no. = 16 amu      Abundance = 58%…

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: The average atomic weight of the Molybdenum isotopes can be calculated as

Q: The relative atomic masses of elements are seldom whole numbers because A. atoms of some elements…

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Q: Gold is very malleable which means it can be pounded into very thin sheets. Decorative gold leaf can…

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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.