Which of the following has a different number of neutrons? a.123Sb b.125I c.120Cd d.122In

Q: Isotopes are defined as atoms ofa. the same element with different numbers of protons.b. radioactive…

A: Atoms of the same element have the same number of protons, which is also called the atomic number.

Q: Define the term atomic nucleus?

A: Atoms are the building blocks of any matter. The composition of the atomic nucleus gives information…

Q: Fill in the information missing from this table. nuclide protons neutrons Z A 1 22 27 0 0 0 5 11 0 0…

A: Atomic number = Z Mass number = A Atomic number = number of protons Mass number = (number of protons…

Q: 2.65 How many protons and neutrons are in the nucleus of the following atoms? (a) 27A1 (d) 207PB (b)…

A: a) 27Al The atomic number of Al is 13. Its mass number is 27. Number of protons is equal to the…

Q: Why are some atoms radioactive?

A: The radioactive nuclei are unstable and have an excess number of either protons or neutrons in the…

Q: 35. Who discovered the neutron? J. J. Thompson Ernest Rutherford James Chadwick Marie Curie A B C

A: The essential nature of the atomic nucleus was established with the discovery of the neutron by…

Q: Electron capture leads to the: (A) emission of an electron from the second shell in an atom. B…

A: Electron capture leads to ?

Q: Image a chemist was trying to create a stable isotope with 60 protons and a mass number of 155.…

A: The nucleus consists of protons and protons that are responsible for the overall mass of the atom.…

Q: 2. In a certain fission reaction, U-235 (atomic no 92) reacts with a neutron to form Cesium- 138…

A: Balanced nuclear equation is the equation in which the sum of subscripts as well as sum of…

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

A: Alpha particle is a helium nucleus.  When a nucleus emits alpha particles, it undergoes decrease in…

Q: Naturally occurring neon exists as three isotopes. 90.51% is Ne-20 with a mass of 19.99 amu, 0.27%…

A:

Q: Rhenium has two naturally occurring isotopes, Re-185 (mass = 184.953 amu) and Re-187 (186.9558 amu).…

A: The average atomic mass of the substance can be determined by the addition of the masses of each…

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: Who presented the idea of neutron particle in nucleus? Frederic Soddy Ernest Rutherford Niels Bohr O…

A:

Q: Which of the following particles will NOT undergo deflection in a magnetic field. A Alpha particles…

A: The particle having charge, deflected in the magnetic field, the positively charged particle…

Q: What is a neutron?

A: Number of neutrons in an atom = mass number - atomic number

Q: Calcium-45 has too many neutrons compared to the number of protons. Because of this, it will most…

A:

Q: For a beta (β) particle, give the number of protons:  neutrons: electrons:

A: Answer  Beta particle have -1 charge and same as the electron

Q: Neutrons: O Have a relative mass of 1 and a charge of +1 O Have a relative mass of 0 and a charge of…

A: A neutron is a sub-atomic particle with no net electrostatic charge, with a very similar mass to a…

Q: What is a stable isotope of lithium? How many electrons does it have?

A:

Q: Fill in the information missing from this table. nuclide protons neutrons Z A 0 0 0 66 164 0 70 106…

A: we have to fill the given table

Q: Fill in the information missing from this table. nuclide protons neutrons Z A 0 0 33 75 0 0 12 14 0…

A:

Q: In each pair of isotopes shown, indicate which one you would expect to be radioactive. 20 17 40 45…

A: Radioactivity can be defined as the process in which there is spontaneous emission of radiation in…

Q: Which demonstrates the existence of isotopes? a. 18 Ar and K b. ºC and EN c. 23 Th and 23 Th d. 7Z1…

A: Isotopes : Two or more forms of the same element that contain same atomic number (same number of…

Q: What is the mass of the isotope is arsenic-73

A: The correct answer is given below

Q: From greatest to least, rank them by the number of nucleons in the nucleus. Consider the atoms (a)…

A: In chemistry, the term nucleon can be defined as the subatomic particle which is found in the…

Q: How many neutrons are present in P-31 and S-32? Select one: A. 15 and 14 B. 16 and 15 C. 16 and 16…

A: Given that:  Atomic mass of P(phosphorus) = 31 Atomic mass of S(sulphur) = 32 We know, atomic number…

Q: An alpha particle has a mass number of ____ and a charge of ____.

A:

Q: number of protons, neutrons, and electrons

A:

Q: Indi cate of protons and neutrons in the following nuclei: the number b) 201 Hg

A:

Q: In ______, an _ particle (identical to a helium nucleus of two protons and two neutrons) is ejected…

A: A radioactive decay in which alpha particle decays into another nuclei with a mass number reduced by…

Q: Naturally occurring titanium exists as five stable isotopes. Four of the isotopes are: 46Ti with a…

A: The mass of the fifth isotope of titanium can be calculated as

Q: [d] Do the same with these five words: beta, neutron, uncertainty, decay, electron.

A: [c] Write a single sentence, using all of these five words plus other words, that makes scientific…

Q: Which particle, if lost from the nucleus, changes the atomic mass the greatest?   a. proton   b.…

A: b. alpha particle

Q: A0.500 g sample of rock was found to have 2.45 × 106 mol of potassium-40 (t1/2 = 1.3 × 10° yr) and…

A:

Q: On the periodic table of the elements, mercury (Hg) has an atomic number of 80 and a mass number of…

A: The atomic number of Hg = 80 Mass number of Hg = 200.59

Q: Negatively charged particles of radiation emitted from the decay of radioactive substances are known…

A: A) Protons : It is one of the fundamental particle of an atom. It is basically  positively charged…

Q: A new element has been discovered. This element has an atomic mass of 120.946 amu and only two…

A: Solution :        Atoms are very important basic building blocks of an element which consists of…

Q: 55.75g Al + 215,5g Oxygen , what mass is formed

A: Answer= 105.31 g

Q: Caused large deflections of alpha particles in Rutherford's experiment  a. proton b. neutron c.…

A: The work of Rutherford is well known among all the scientist due to his approach to establish the…

Q: Compare the neutrons in 188RE and 188W.

A: mass number = number of protons + number of neutrons  number of neutrons = mass number - number of…

Q: An 18 O atom contains the same number of protons. neutrons, and electrons.

A: Given atom, 8O18

Q: Magic numbers are associated with protons and neutrons in a nucleus. State the magic numbers for…

A: There are many factors that give to nuclear stability.  These are, Full nuclear shell (magic…