A new element is discovered that has a mass of 3.2 x 102 u for15 atoms. What is the atomic mass? A. 3.2 × 10² B. 0.047 C. 21 D. not enough information E. None of these answers

Q: How many protons, neutrons and electrons are in one atom of 70/30Zn?

A: We have given that  atom   3070Zn   We know that Representation of an element                Z AX…

Q: symbols of each atom,

A:

Q: Which best describes isotopes? A. Same number of neutrons, different number of electrons B. Same…

A: atoms of the same element have the same number of protons, but some may have different numbers of…

Q: 3. What mass of Al contains the same number of atoms as 3.0 g Pb7 a. 23 g b.0.014 g C. 3.0g d. 0.39…

A: 3. mass of Pb = 3.0 g molar mass of Pb = 207.2 g/mol moles of Pb = 3.0 g / 207.2 g/mol…

Q: 1. Give the number of protons, the number of neutrons, and the neutron-to-proton ratio for each of…

A:

Q: 1. Which of the following is not one of Dalton's laws? a) Atoms are indestructible. b) Atoms of the…

A:

Q: An element has three naturally occurring isotopes with the following abundances and masses::…

A: Since the atomic mass of any element is given by the average mass of its isotopes Hence the atomic…

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

A: The given symbol for isotope is 8538Sr A) The atomic number is represented by the subscript.     The…

Q: There are ______electrons and _____ neutrons in the ion of  P–3 . Atomic number: 15 Mass number :…

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

Q: There are electrons and +2 neutrons in the ion of Cd Atomic number: 48 Mass number : 112 O A. 46, 48…

A: Given ion,    Cd2+ ion    Mass number = 112    Atomic number = 48

Q: A fictional element has 2 isotopes and an atomic mass of 67.18 amu. If the first isotope is 66 amu…

A: Average atomic mass can be determined by the equation given below:

Q: 13. Calculate the percentage of bromine atoms that have a mass of 78.9183 amu and the percentage…

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Q: 3) A tiny speck (8.3 x 107 mol) of radioactive americium-241 is used in smoke detectors. How many…

A:

Q: 16. Give complete symbols of each atom, including the atomic number and the mass number. a. a…

A: An atom has nucleus. Protons and neutrons are present in nucleus. Electron revolve around the…

Q: 15 Which best describes the atom: 26Fe A. 56 protons, 26 neutrons B. 26 protons, 30 neutrons C. 26…

A: Since you have asked a question with multiple sub-parts, as per our company guidelines we are…

Q: How would you determine the accuracy of an atomic mass?

A: The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of…

Q: 17. Write the atomic mass for Carbon to 3 significant figures.

A: Carbon is non metal  Carbon Symbol is C  Carbon atomic number  is 6  Carbon electronic configuration…

Q: 13. Which pair represents isotopes? a. He and »He b. seFe and sa:Mn c. Si and suP 14. Which pair…

A: Identify isotopes pair among them --

Q: change as the volume 5. Which of the options below share the same exte A. 50 kg of concrete. 50 m³…

A: In structure of atom, there is nucleus present inside the atom and electrons are revolving around…

Q: Calculate the mass (in grams) of a tungsten atom. A. 1.107 x 10 - 26 B. 1.661 x 10 - 24 g C. 3.054 x…

A: Molar mass of tungsten = 183.84g/mol

Q: An atom of copper has a mass about four times greater than that of an atom of oxygen. What choice…

A: Mass of copper atom = 4 x mass of oxygen atom

Q: 15 If an element has 26 protons and 23 electrons: a.    The element forms a cation b.    Two of the…

A:

Q: Some of the naturally occurring isotopes of tin are tin-118, tin-119, tin-120, and tin-124. a. How…

A: Isotopes of tin are tin-118, tin-119, tin-120 and tin-124 To determine: a) Number of neutrons in…

Q: 81 neutrons 54 electrons Determine the number of protons, neutrons, and electrons in Cut. protons…

A:

Q: 3. Carbon-14 is an isotope: A. it has the same number of protons and electrons as Carbon-12, but a…

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

Q: Atomic o Mass Number of Name uon lo Symbol Number Neutrons W. Number 8. 2raon ls. 1sd: bozogorq 10 6…

A: Atomic number of an atom is equal to the number of protons present in it. It is written in the…

Q: How many aluminum atoms are there in 3.50 grams of Al₂O₃? (At. Wts.: Al = 27, O =16) a. 4.13 x 10²²…

A: Mass of Al2O3 = 3.50 g Molar mass of Al = 27 g/mol Molar mass of O = 16 g/mol Molar mass of Al2O3 =…

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.