The nucleus of an electrically neutral Chromium atom contains 24 protons. How many electrons does this Chromium atom have?

Q: Write the electronic structure of the elements of the alkali atoms (Na, K, Rb, Cs).

A: 1) Na It is named as sodium It has atomic number 11 and hence its electronic structure is given as-…

Q: The nucleus of an iron atom has a radius of 4x10-15 m and contains 26 protons. What repulsive…

A: It is given that,

Q: The half-life of strontium-90 is 28 years. How long will it take a 50-mg sample to decay to a mass…

A:

Q: If you are told the half life of a material is 3,500 years, then how much would be remaining from a…

A: Given data: Half life (t1/2)= 3,500 years Initial quantity of the substance (N0) = 10 g Time elapsed…

Q: Give the ion notation for an atom with 15 protons and 18 electrons.

A:

Q: One of the radioactive nuclides formed in nuclear power plants is hydrogen-3, called tritium, which…

A: According to theroy of Radioactivitythe decay rate of a nuclei which has initially N0 nuclei  at any…

Q: The half life of Thorium is 75,000 years. How much of the substance will be left after 3 half lives

A: Let initial amount of substance is m. The half life is T= 75000 years.

Q: A particular atom contains 29 electrons, 34 neutrons, and 29 protons. What is the identity of this…

A:

Q: An electron volt, eV is a unit of energy,. Which is larger, a GeV or MeV?

A:

Q: How many protons are in the nucleus of an antimony atom

A: An atom mainly consists of two parts: nucleus and electron orbits. In the nucleus, there are two…

Q: How many alpha particles are emitted per second from 1 microgram of radium?

A: we know that,  1C= Activity of 1 g of Radium=3.7×1010 days

Q: A certain five cent coin contains 5.00 g of nickel. What fraction of the nickel atoms’ electrons,…

A:

Q: Define the composition of an atom along with its electrons, neutrons, and protons.

A: Composition of an atom

Q: A bromine atom has an atomic number of 35 and an atomic mass of 80. What is the structure of this…

A: Given data: Atomic number, z=35 Mass number, A=80

Q: In the computer lab, you used the PHET simulation to build an ion with 4 protons, 6 neutrons, and a…

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Q: How fast are the protons going now?

A:

Q: Give the ion notation for an atom with 20 protons and 18 electrons

A: Introduction: Ion is defined as an atom that does not have an equal amount of electrons and protons.…

Q: A radioactive material has a half-life of eight days. How long will it take for the material to be…

A:

Q: Where is the electron in an atom

A: An atom is made of electrons protons, and neutrons. Protons and neutrons are in the nucleus of the…

Q: In a LASER, the energy of the emitted light comes from: a) The thermal energy of the active…

A:

Q: The mass of an atom is measured in atomic mass units. One atomic mass unit is equal to 1.66x10-27…

A: The masses of atoms and subatomic particles are very small.

Q: When thorium decays by emitting a beta particle, what is the atomic number of the resulting nucleus?

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Q: The mass number of an atom is found by O adding the number of protons and neutrons. adding the…

A:

Q: A neutral Carbon-13 atom has protons, neutrons, and electrons.

A:

Q: 1. Neutral atom always has A) more neutrons than protons. B) more protons than electrons. C) the…

A: Given data:  The neutral atom Required: The relationship between number of protons, electrons and…

Q: The radioactive element 2760Co  has a half life of ______ years. If you had a sample of 17 g, about…

A: Given: The mass of sample (m) = 17 g. The half-life of cobalt (T1/2) = 5.27 years. The life of…

Q: What determines the identity of the element? Atomic MASS (# of protons and neutrons) Atomic NUMBER…

A: What determines the identity of the element ?

Q: . One isotope of oxygen has the atomic number 8 and the mass number 18. An atom of this isotope…

A: We know Isotopes have same atomic number (protons number ) but deferent mass number given oxygen has…

Q: Derive the expression for the particle speed entering the magnetic field.  Calculate the speed…

A: (1)   Write the expression for the kinetic energy, and solve for the expression for the partivle…

Q: If you have a 450 mircocoulomb charge attached to an element how many excess protons would you…

A: Given: The charge on the element is 450 μC.

Q: The subatomic particles in the central nucleus of an atom are O protons and electrons electrons and…

A:

Q: 15. If neon-20 captures an alpha particle, find the following for the product: i) the name of the…

A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: f the half-life of cesium-137 is 30 years, approximately how much time will be required to reduce a…

A:

Q: The binary code for (15), is

A: Answer: option C

Q: A radioactive isotope has a half-life of 51.5 days. What fraction of the isotope remains after 413…

A: We have: The half-life is t1/2=51.5 days Calculating the first-order reaction constant k as…

Q: A sample of a radioactive element has a half-life of 180 days; what percent of this sample will…

A: The decay constant of a radioactive sample is given by :  The amount of sample left after 't' time…

Q: A radioactive nuclide has a half-life of 10 seconds. Beginning with 256 grams of the material, how…

A: Given: Half life period t1/2 = 10 sec Initial concentration N0 = 256 g Time = 1 min = 60 sec = 6…

Q: The atomic mass of an atom is equal to the number of protons and: O Neutrons O lons O Electrons O…

A: The atomic mass of an atom is equal to the number of protons and: O Neutrons O lens O Electrons O…

Q: If the element Europium is 276 grams then how many atoms would it have?

A: Natoms=NAvamMmolar

Q: ____ are the charged parts of an atom. a. Only electrons b. Only protons c. Neutrons only d.…

A: Among the constituents of atom, electron is negatively charged, proton is positively charged and…

Q: Sketch a model of an atom, showing the positions of the subatomic particles protons, neutrons, and…

A: Protons p+ , neutrons n0 and electrons e- are subatomic particles.  p+have + ve charge. e-s have -ve…

Q: The nucleus of an electrically neutral iron atom contains 26 protons. How many electrons does this…

A: Since the atom is electrically neutral, the total charge on it must be zero. The charged particles…

Atomic Number

Elements are the building blocks of all the matter that exist in the universe. Every element is made up of atoms that have protons, electrons, and a nucleus. In order to know the difference between the elements, an atomic number is used. Every element has its own individual atomic number. The atomic number is a single most important characteristic of an atom.