In chemical reactions, sodium (Na) is more likely to behave similarly to which element?   a. Potassium (k)   b. Magnesium (Mg)   c. Fluorine (F)   d. Iron (Fe)

Q: You have discovered a new element - Bluehenium (Bl).  It has two naturally occurring isotopes 68Bl…

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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: The first atoms of seaborgium (Sg) were identified in 1974.The longest-lived isotope of Sg has a…

A: (a) we are asked to give the of protons electrons and neutrons in the given atom 266Sg  The number…

Q: 36. Which statement about protons is false?(a) Protons have about the same mass as neutrons.(b)…

A: An atom is made of three particles namely, protons, neutrons, and electrons. The protons and…

Q: Aluminum has 13 electrons, 13 protons and 14 neutrons a) What is its atomic mass? b) What is its…

A: The atomic number of aluminium is = 13 The number of protons in the aluminium is = 13 The number of…

Q: Selenium-80 is a naturally occurring isotope used in overthe-counter supplements.a. How many protons…

A: An atom is mainly composed of three sub-particles; electrons, protons and neutrons. These particles…

Q: What are the main ideas in Dalton’s atomic theory?

A: Dalton was a well-known experimentalist and his significant studies on behaviours and properties of…

Q: Why are the chemical properties of all isotopes of the same element identical?

A: Atoms of the same element, having same number of protons and electrons, but differing only in the…

Q: A sample of magnesium is found to contain 78.70% of 24Mg atoms (mass 23.98 amu), 10.13% of 25Mg…

A: The atomic mass of an element is the average of masses of all the isotopes of that element present…

Q: 8. 99.759 15.995 Oxygen 8. 0.037 16.995 180 0.204 17.999 8. Isotopic abundance data is given for…

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Q: What are the components of an atom? How are they different?

A: The components of an atom and how are they different have to be explained below.

Q: Periodic Table Matching - Part B Periodic Table Matching - Part C Argon (Ar.) A. Atomic mass is more…

A: Given, Elements from periodic table. We have to match the properties of each element with the given…

Q: A certain element exists as three different isotopes, 29.1% of all the isotopes have a mass of 75.23…

A: The average atomic mass can be calculated by using Following formula - AAM = (Mass of 1st isotope×%…

Q: a. How many protons does this element have? b. How many neutrons does this element have? c. How many…

A: The atomic number of an atom is the number of protons present in the atom. For a neutral atom, the…

Q: LKuipor Bek asderolch Jupiter Mércúry Venus * Uranus Saturn Mars Earth Ceres Neptune Jupiter Pluto…

A: Dwarf planet : Dwarf planet is a celestial body orbiting a star that is massive enough to be rounded…

Q: 5. List the three subatomic particles and their properties.

A: To find: The list of three subatomic particles and their properties.

Q: [References] Americium-241 is an isotope of americium used in household smoke detectors. This…

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Q: (a) How many protons are found in one atom of selenium-80? protons (b) How many neutrons are found…

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Q: What is the atomic mass unit? a mass of a carbon atom b mass of a hydrogen molecule c (1/18) of…

A: What is the atomic mass unit?

Q: A(n) ______________________ has a negative charge an a mass about 1,800 times smaller than a proton.…

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Q: Consider the following selected postulates of Dalton's atomic theory: (i) Each element is composed…

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Q: Fig 12.1 represents a neutral lithium atom. All the particles in the atom are shown on the diagram.…

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Q: A hypothetical element, X, has two isotopes: 47X with an isotopic mass of 47.621 amu and 51X with an…

A: The atomic mass of the element can be calculated as,

Q: What is the chemical element? X

A: Here we have asked about the information for the chemical element 'X'. We can tell about this as…

Q: Q5/ A- Atoms are spherical and so when silver atoms pack together to form silver metal, they cannot…

A: 5- (A)

Q: For an atom to be electrically neutral, it must have the same number of:   a. electrons and…

A: The charge on the proton is positive . The charge on the electron is negative . There is no charge…

Q: Was Democritus’s proposal of the existence of atoms based on scientific methods or ideas? Explain

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Q: Which statement about protons is true?(a) Protons have twice the mass of neutrons.(b) Protons have…

A: An atom is the fundamental particle of matter. Atoms consist of a certain number of protons and…

Q: 5) Consider an atom of the element nitrogen (N). A nitrogen anion can be formed fr this atom by a)…

A: Anion is negatively charged species.

Q: Boron occurs naturally as 10B and 11B. Which isotope is most abundant? (Refer to the Periodic…

A: The isotopes can be described as the types of the species which have equivalent atomic number…

Q: Which pair of particles has the same number of electrons?

A: Total electrons in a cation = atomic number - total positive charge  Total electrons in an anion =…

Q: The neutral hydrogen atom consists of   a. one proton and one neutron.   b. one proton, one…

A: Atomic number of hydrogen atom is 1. It is the first atom in the periodic table.

Q: 15. The elements sodium (Na) and chlorine (CI) are both deadly poisons. Salt (NaCl), which contains…

A: The given data is, the elements sodium and chlorine are both deadly poisonous. But the salt contains…

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: After studylng the chemical reactions of many compounds made of carbon, August discovers a chemical…

A: According to the question, we need to determine the missing words in the following phase.

Q: The atomic mass of the imaginary element Doginium is 15.542 amu. Doginium has two isotopes:…

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Q: Since there are many more Carbon-12 isotopes found in nature, the mass of Carbon-12 should carry the…

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Q: Antimony has many uses, including infrared devices and as part of an alloy in lead storage…

A: a) Notation for each isotope antimony 121 ---->   51Sb121   antimony 123 ---->   51Sb123

Q: Which pair correctly matches an element to its atomic number? O a) 9.012 - Be O b) 12.01 - C c)…

A: The atomic number of an element is equal to the total number of protons in the nucleus of the…

Q: 32p is an isotope of phosphorus that is frequently used in Biology labs. It has a mass number of 32.…

A: The given isotope is 32P.  The mass number of 32P, A = 32  Atomic number of 32P, Z = 15

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: 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: Imagine a new element (symbol X) has been found on Mars. Four isotopes of the element have been…

A: Average atomic mass of element X can be calculated by using the equation: Average atomic mass of X =…

Q: A pictorial representation of JJ Thomson's model of the atom would be describer solar system;…

A: JJ Thomson model of an atom:- JJ Thomson theoretically described the anatomy (inner structure) of…

Q: What is this element? 1s2 2s2 2p6 3s2 3p6 4s2 3d10 * a. Zinc b. Copper c. Nickel d. Germanium

A: The distribution of electrons in an element's atomic orbitals is described by its electron…

Q: fluorine (F) nitrogen (N) boron (B) iodine (I) Which two elements are in the same group and would…

A: The elements which have the same number of electrons in the outermost shell (or the same number of…

Q: How many electrons are in 1 coulomb?

A: Particles that reside inside an atom are called subatomic particles. These particles are electrons,…

Q: subatomic particle with a1+ charge

A: In an atom three fundamental particles are present. Positively charged particle proton and neutral…

Q: Which part of John Dalton’s theory was disproved by J.J. Thomson’s cathode-ray tube experiments?…

A: To find: Which part of John Dalton’s theory was disproved by J.J. Thomson’s cathode-ray tube…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.