Isotopes are defined as atoms ofa. the same element with different numbers of protons.b. radioactive elements.c. stable elements.d. the same element with different numbers of neutrons.

Q: Describe John Dalton's atomic theory?

A: Structure of atom is the significant discovery. Different scientists has proposed different…

Q: Rutherford’s gold foil experiment consisted of firing positively charged alpha particles at a thin…

A: Rutherford alpha particle experiment. He observed that when alpha particles are passed through the…

Q: In _______, a negatively charged electron is ejected from the unstable nucleus, converting a neutron…

A: Stability of the nucleus is generally influenced by 3 factors- Mass Defect: greater mass defect,…

Q: [References] An element consists of 0.19% of an isotope with mass 135.907 u, 0.25% of an isotope…

A: Given : Mass of isotope 1 = 135.907 u  Abundance of isotope 1 = 0.19 % Mass of isotope 2 = 137.9060…

Q: A helium nucleus has two protons and two neutrons. Howmany electrons would it take to equal the mass…

A: ANSWER

Q: The number of protons (is, is not) always equal to thenumber of electrons in orbit around the…

A: The symbol of an element is defined as  ZXA Where  A = mass number = Z + N              Z  = Atomic…

Q: Use the atom builder interactive to determine whether each nucleus is stable or unstable.

A: For a stable nucleus the ration of numbers of neutrons and number of protons must be 1:1 for…

Q: Protons and neutrons are found in the (a, surrounded by nearly empty space where (b) are located.…

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Q: What are the atomic number (Z), mass number (A), andsymbols for the iron isotope with 30 neutrons?

A: Given that  Atomic number denotes = Z  Mass number denotes = A  The relation between atomic number Z…

Q: Which of these atoms have the less mass

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Q: In atoms, protons and neutrons are found (a) only in the nucleus. (b) outside the nucleus. (c)…

A: An atom is composed of three main sub atomic particles; electrons, protons and neutrons. Out of…

Q: will be closest to which value? (A) 35 (B) 36 (C) 37 (D) 38

A: Isotopes are defined as same atoms having same atomic number but different mass number.

Q: What is isotopic notation example and definitions please?

A: Isotope Notation is also known as nuclear notation. It is written form of an element that describes…

Q: Even though several elements have only one naturallyoccurring isotope and all atomic nuclei have…

A: The average mass of naturally formed isotopes is the atomic mass of the atom and the sum of number…

Q: An element has three naturally occurring isotopes. What other information must you know in order to…

A: Natural abundance and mass number of atoms of an element are required for calculation of atomic mass…

Q: I с со I [References] VII Available Electrons: 16

A: Here we have to follow the basuc rule of Lewis dot structure and proceed according to that .

Q: A friend from your general chemistry class claims that the nucleus occupies a large volume in an…

A: The person claims that nucleus occupies a large volume in an atom. Let's see whether the claim is…

Q: A- Determine the mass of nucleons and electron by atomic mass unit?

A: mass of 1  electron = 5.45e-4 amu, mass of proton = 1 amu and mass of neutron = 1.     Now, nucleons…

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: Chemistry midterm A neutron has a mass of and a charge of

A: A neutron is a particle present in the nucleus of the atom. It is a neutral particle having 1 unit…

Q: Explain why the atomic mass of an element is an average mass

A:

Q: The difference of a few little protons, neutrons, and electrons can produce a variety of…

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Q: 24.1% of all isotopes of an element have a mass of 75.23 amu. 48.7% have a mass of 74.61 amu and…

A:

Q: List and explain Dalton's atomic theory (postulates). Explain which postulates were rejected and…

A: John Dalton gave the first postulates about the structure of an atom......

Q: number of atom: 31. 0 a of

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

Q: Fill in the missing mass number and atomic number for each of these particles or types of radiation.…

A: The Radioactive atoms emit radiation of different frequencies.  The radiation are emitted by the…

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

A: Dalton's atomic theory are as follows  (1) Atoms are indivisible,tiny particle of same size and same…

Q: In any neutral Adam there are equal numbers of? A. Neutrons and electrons B. Protons and neutrons…

A: Neutral atom are those having not any charge. They are wholely neutral

Q: Describe Rutherford’s nuclear theory?

A: Rutherford, in his experiment, directed high energy streams of α-particles from a radioactive source…

Q: Which part of the atom has most of mass ?

A: Most of an atom's mass is in its nucleus.

Q: The existence of isotopes violates one of the original ideas of Dalton’s atomic theory. Which one?

A:

Q: what is the A, Z, E, CHARGE, MASS, # OF NUETRONS, PROTONS AND ELECTRONS OF POTASSIUM -40

A: Mass number (A) = number of protons + number of neutrons Atomic number (Z) = number of protons. E =…

Q: Complete the following by placing the missing words correctly. The atomic theory was given by + .…

A: Atomic theory is given by dalton.proton is a fundamental particle.

Q: How many isotopes does this element have?

A: From the graph, it is cleared that the number of isotopes of the unknown element is 5.

Q: What are the atomic number and mass number for the carbon isotope with seven neutrons?

A: The atomic number of the carbon isotope is 6.

Q: why Rutherford's model of an atom was considered to be unstable?

A: Rutherford’s experiment:Rutherford suggested that there is something at the center of the metal…

Q: proposed

A: Democritus theory is Ancient theory, He say about that matter consists of atom means smallest…

Q: Describe the motion of the particles from A to B

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Q: Use the Atom Builder interactive to identify each nucleus as stable or unstable.

A: In the given diagrams the purple sphere represents the number of protons and the white spheres…

Q: Element X has two isotopes. The first isotope has a natural abundance of 80% and has a mass of 60…

A: Given : Abundance of first isotope = 80% Mass of first isotope = 60 amu Abundance of second isotope…

Q: 2. Add a neutron to the Carbon-12 nucleus. Observe how the mass number changes. Which particle(s)…

A: Atomic number of an atom = number of protons  For a neutral atom :-  No.of protons = number of…

Q: If you wanted to change the atomic number in the simulation, changing the number of which particle…

A: An atom contains the subatomic particles like Electrons, Protons and Neutrons. The subatomic…

Q: In Rutherford’s gold foil experiment, which particle(s) were used? Group of answer choices α-rays…

A: Alpha rays (radiation) is the emission of an alpha particle (helium nuclei). Beta rays (radiation)…

Q: In Rutherford's gold foil experiment, a very small number of α-particles were deflected, what about…

A: Given  Statement of Rutherfold's gold foil experiment = deflection by small number of alpha particle…

Q: For 223FT, number of protons = number of neutrons = + and number of electrons = For 227 Fr, number…

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Q: 1. If an atom has a radius of 100 m, it would approximately fill a football stadium. a. what would…

A: a) If an atom has a radius of 100 m, it would approximately fill a football stadium. What would the…

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.