Silicon has three isotopes: Silicon-28, Silicon-29, and Silicon-30. Which isotope is the most abundant given that the atomic mass of Silicon is 28.086 amu? A. Silicon-28 B. Silicon-29 C. Silicon-30 D. There is not enough information 19 10 18 10

Q: 19. How best describes isotopes?     20. Who discovered lectrons?

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Q: Calculate the average atomic mass of uranium given its naturally occurring isotopes and their…

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Q: 3) What defines the atomic number of an element? a. The number of shells b. The number of neutrons…

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Q: A. For the isotope chlorine-37: a. How many protons are in chlorine-37? b. How many neutrons are in…

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Q: 85 11. For the Isotope 38Sr A. What is the atomic number? B. What is the mass number? C. What is the…

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Q: Must the numbers of protons, electrons and neutrons be the same or different in each of the…

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Q: Chemistry: Fundamentals and Principles Davidson presented by Macmillan Learning For each set of…

A: For a neutral atom, Atomic number = Number of protons = Number of electrons and Mass number = Number…

Q: MCQ 20: The number of atoms in the same element has the same number of A. protons B. electrons C.…

A: ATOM The atom is the smallest unit of a chemical element and is the basic unit of matter which…

Q: Calculate the atomic mass element "X" if it has 2 naturally occuring isotopes withthe following…

A: Percent abundance of X-51 = 67.88 %  Percent abundance of X-53 = 32.12 %

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A: The given compounds are 11850Sn 195Pt To find: atomic number, mass number, number of protons, number…

Q: 2. The isotope of iodine with a mass number 131 is often used in medicine as a radioactive tracer.…

A: We know that, Number of proton= Atomic number=no. of electron (when no any charge present) no. of…

Q: Using the atomic symbol below, how many neutrons are in this isotope? 2357 92 iments

A: The number of neutrons is equal to the difference between the mass number of the atom (A) and the…

Q: lons are Select one: O a. neutrons O b. Charged particles O c. Protons O d. Electrons

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Q: MCQ 4: The atomic number is the number of A. protons (p) B. electrons (e) C. neutrons (n") D.…

A: In an atom, a nucleus contains protons and neutrons in which former is positively charged and latter…

Q: 21. The elements in Group 7A are known by what name? A. transition metals B. halogens oli m D.…

A: Group 7A of the periodic table consists of the elements: fluorine (F), chlorine (Cl), bromine (Br),…

Q: What is the atomic mass of boron-12? A. 13.00335 amu B. 4.00260 amu C. 18.99840 amu D. --…

A: Since boron has atomic number = 5  Hence number of electrons in boron = 5 and to become neutral atom…

Q: QUESTION 5 Fill in the blanks: Atomic # Element Symbol Mass # number of neutrons number of electrons…

A: atomic mass = no. of  proton + no. of neutron (in atom) In a neutral atom , no. of proton =no. of…

Q: Choose the atom which has a different number of neutrons than the rest. Select one: O a. a. 93 Nb 41…

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Q: Calculate the number of neutrons in Krypton-80. Select one: a. 45 O b. 48 44 O d. 35

A: krypton is belong to the noble gases . nobles gases are present in last group of the periodic table…

Q: 37. The ion $$Mn ² contains which combination of protons. neutrons and electrons? ITTT Protons 25…

A: Given ion is, 55Mn-2  where 55 is mass number of ion . Mass number is sum of proton and neutrons.…

Q: Identify for an atom of 55Mn: element name: _____________ Z, atomic number = ____ A, mass number…

A: The nuclear symbol of the isotope given is 55Mn.

Q: How many protons, neutrons, and electrons are in the following? a. 1 atom of iodine-127 b. 1 atom of…

A: Solution : 1)The atomic number of Iodine is 53 which tells us that it contains 53 protons in its…

Q: Which of the following is the least massive?  a. A neutron b. A proton c. An alpha particle d.…

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Q: Rubidium has two naturally occurring isotopes, from the following data calculate the value of X?…

A: B. 84.9545 Given that,  Atomic mass isotope of rubidium with 0.7285 fractional abundance = x Atomic…

Q: Part III. Calculate the percent of each isotope using the atomic mass found on your periodic table.…

A: The elements are arranged in the rows and column of the periodic table. Moreover, certain elements…

Q: Atomic structure and Mass r which iso to pee in each pair contains mone neutrons? a chlorine - 35 or…

A: In any element, the number of neutrons is given by, Number of neutrons = Mass number - Number of…

Q: From the results of his gold foil experiment, Rutherford concluded that   Group of answer choices A.…

A: From the results of his gold foil experiment, Rutherford concluded that atoms are composed of a…

Q: 30. How many protons are there in Po-209? a. 84 b. 125 С. 123 d. 209 31. How many protons are there…

A: * Mass number of element =  Number of protons + Number of neutrons * Atomic number = number of…

Q: / protons

A: Since you have asked multiparts, we will solve the first three subparts for you. If you want any…

Q: Write atomic symbols for the following isotopes а. С-13 b. N-14 с. Pb-207 d. Cl-35 e. U-238 f. Cu-65

A: Atomic symbol is represented as                  zXA Where z= Atomic number  A= Mass number  And X=…

Q: possible isotopes of cobalt?

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Q: 26. Silver has two naturally occurring isotopes with the masses and natural abundances as shown in…

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Q: . Isotopes contain different numbers of *       A. electrons       B. neutrons

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Q: Match the elements…

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Q: Identify the type of subatomic particle based on the description of each for a neutral atom ✓…

A: The objective of the question is to identify the subatomic particle.

Q: 25. How many Neutrons are present in Tin (II) ion?

A: Atomic number of an element is equal to the number of electrons and number of protons. Mass number…

Q: Consider the following data for the element Z. what is a) percent of abudance and average mass (in…

A: Every atom in periodic table has some atomic mass and atomic number. When atomic number of two…

Q: For the elements below give the missing values. 160 a. 8 Name: Atomic number: Mass number: Number of…

A: Atomic number = Number of protons Mass number = Number of protons + Number of neutrons Number of…

Q: How many protons, neutrons and electrons are present in the following: 40 a) s"B b) 173°CH c) 18°Ar…

A: The atomic number of element is the number of protons or electrons present in isolated neutral atom.…

Q: Calculate the number of neutrons in Bromine-83. Select one: O a. 45 O b. 44.1 C. 48 O d. 35

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Q: Given these two atoms, are they isotopes of the same element? Select one: a. No, since they don't…

A: The atoms with the same number of protons but the different number of neutrons or mass numbers are…

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.