A selection of the most prominent individuals mentioned in this topic is given below. Match Column A with Column B. More than one concept may be associated with a single name Column A ______1. Becquerel ______2. Chadwick ______3. Curie ______4. Dalton ______5. Democritus ______6. Roentgen ______7. Rutherford ______8. Thomson   Column B a. proponent of the atomic structure among the ancient Greeks b. proposed the modern atomic theory c. discovered the nuclear atom d. discovered the electron e. discovered the neutron f. discovered radioactivity g. raisin-bread atom h. discovered previously unknown radioactive elements i. Discovered X rays j. discovered the proton

Q: What are the mass numbers and atomic numbers of the following isotopes? a. iodine-131 b.…

A: Mass number is the sum of number of neutrons and number of protons.An atomic number is the number of…

Q: Abeta particle has a mass number of ____ and a charge of _____.

A: Given A beta particle has a mass number of ____ and a charge of _____.

Q: Madame Curie discovered gamma rays. O True O False

A: Gamma rays has no mass and no charge. These are the most energetic form of electromagnetic…

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: The particle given by the following notation 63 Cu2+ Contains protons, neutrons, and electrons…

A: Step 1:

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: QUESTION 21 Atoms consist principally of what three fundamental particles? O Electrons protons and…

A: Earlier it was considered that the smallest unit of any element that contains all the properties of…

Q: ed on the figure from the lecture slides showing the isotopes for the first twenty elements, which…

A:

Q: Which of the following characterizes an alpha ray? Choose all that apply. carries a positive charge…

A: Alpha particals are same as helium containing two proton and two neutron.

Q: Compare and contrast the three primary particles contained in atoms

A: Atom is a smallest particle which cannot be further divided   Atomic particels  atoms consist of…

Q: utral radium atom has a mass of 226 (atomic number 88) it would have neutro electrons.

A: The question is based on concept of atomic structure. We have  to calculate correct  number of…

Q: Fill in the blanks: Isotopes are atoms with the same ________ number but different ________ numbers

A: Atoms are small unit of matter combine to form molecule. Atomic number- It is the no. of protons an…

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

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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 the mass number of zinc-68?

A: The Answer to the the following question is given as:

Q: Consider a sample of antimony collected from a different solar system. The sample contained 45.8…

A:

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

A:

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: mass of electron

A: Electron is defined as the lightest stable subatomic particle known.

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

A:

Q: Above what atomic number are there no stable isotopes of any element? 20 89 83 92 40

A: Atomic number 92

Q: The atomic particle having a mass of 0 amu and a charge of -1 is: Group of answer choices a proton…

A: An atom is composition of smaller particles called subatomic particles. The subatomic particles have…

Q: 38 If naturally occurring chromium were made up of only 2 isotopes of Chromium-51 and Chromium-53…

A:

Q: How do the mass number and the average atomic mass differ for a particular element?

A: There is difference between mass number and average atomic mass.

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

A:

Q: How many protons, neutrons, and electrons are there in the following 119Sn atom?       50p; 69n;…

A: The number of protons are always equal to its atomic number.

Q: * Question 31 If you add an additional neutron to an atom, what do you create? A an isotope an ion a…

A:

Q: From the list below, choose the atoms that ONLY have radioactive isotopes. Gold Curium Bismuth…

A: Radioactivity is the property of certain atoms to spontaneously emit particles and/or energy from…

Q: Which are the three basic parts of the nuclear theory of the atom?

A: The nuclear theory of the atom is given by Rutherford which has the following basic parts. In the…

Q: Select all of the following that are isotopes of 28Si.  Group of answer choices 29Si An atom with…

A: Concept introduction. Isotopes are the substance having same atomic number but different atomic…

Q: Identify for an atom of 9Be: element name: _____________ Z, atomic number = ____         A, mass…

A: Give the answer for 9Be atom= ?

Q: Which of the following statements about lead is accurate?  there is only one isotope of lead…

A: The relative amounts of one lead isotope to another often depends on where the lead ore was mined

Q: Select the two isotopes of nitrogen-15. carbon-13 15N 0-15 F²- 14N Ophosphorus-15 N-16 0+ 150…

A: Isotopes have same atomic number and different mass number.

Q: There are __________ electrons, __________ protons, and __________ neutrons in an atom of…

A:

Q: Henri Becquerel discovered that unstable atoms were giving off small particles/rays. What was coming…

A: Nuclear radiation The emission of elementary particles or energy resulting from the decay of atoms.…

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.