A scientist needs to find an atom that will work well for her experiment on middle school students. She wants to find an element that is very reactive (just like middle school kids are) What part of the atom should she look at to determine whether it will be reactive or stable? Protons Neutrons O Valence Electrons O Nucleus

Q: 107. Prepare a table like Table 4.2 for the four different isotopes of Sr that have the natural…

A: The given atomic masses and % abundance are: mass of isotope (amu) % abundance 83.9134 0.56…

Q: An atom of aluminum has 13 protons and an atomic mass of 27 amu. How many electrons will it contain?…

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Q: Element X has an unstable nucleus due to an over-abundance of neutrons. Which of the following is…

A: Heavy nuclei are unstable because of their heavy mass and they emit radiations in order to reduce…

Q: By the end of this module you will be able to: • · ● · • . Module 2 Atomic Structure and…

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

Q: The Manganese-55 ion, with a charge of +2, has: 25 protons, 30 neutrons, and 25 electrons 25…

A: To find out the number of protons, neutrons and electrons in the given ion, first of all, find out…

Q: A neutral atom of aluminum has 14 neutrons and 13 protons. How many electrons does this aluminum…

A: Number of  protons (p) = 13 Number of neutrons (n) = 14 Number of electrons (e) = ?

Q: the number of copper atoms in 3.0 g lump of copper is 2.8 x 1022. how many electrons are present in…

A: Given: Number of copper atoms in 3.0 g lump of copper is 2.8 x 1022.

Q: An isotope of carbon has 6 protons and a mass number of 14 amu. How many neutrons does it have?

A: Number of protons (p) = 6  Mass number (A) = 14  Number of neutrons (n) = ?

Q: 9. What is the atomic number of the atom in the diagram above? 10. What is the atomic mass/mass…

A: Answer:- These questions are answered by using the simple concept of calculation number of protons,…

Q: Naturally occurring uranium consists of two isotopes, whose masses are shown below: Isotope Mass…

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Q: Draw an atom with 2 protons, 2 electrons and 2 neutrons inside the box. Color and label its parts.

A: Q. Draw an atom with 2 proton, 2 electrons and 2 neutrons inside the box. Answer :         An atom…

Q: Use the Periodic Table to help you answer the following questions

A: Carbon has an atomic symbol of C and belongs to group 14 and second period.

Q: Neon has three different isotopes.  90.51% of neon atoms have a mass of 19.992 amu.  0.27% of neon…

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Q: Consider a hypothetical case in which the charge on a proton is twice that of an electron. Using…

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Q: Which of the following isotopes has the highest number of neutrons? 15 7F 17 8.

A: The given options are,

Q: Consider a hypothetical case in which the charge on a proton is twice that of an electron. Using…

A: Answer: Potassium-39 means, its mass number is 39. Also neutron is always a neutral particle.

Q: 12. Four students were asked to complete a table for a science assignment. Each student selected one…

A: Description of question with answer given

Q: Introduction: The information provided on the periodic table allows you to determine the number of…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: Which of these pairs of atoms are isotopes? Atom A: 13 protons, 12 neutrons and 12 electrons. Atom…

A: Definition of isotopes =>  Isotopes are those whose atomic number is same (means number of proton…

Q: Since there are many more Carbon-12 isotopes found in nature, the mass of Carbon-12 should carry the…

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Q: Diane, Timothy and Ira were having a discussion about isotopes and the tendency to react. Which do…

A: Please find your solution below : Isotopes are the atoms of same element that have same number of…

Q: Marie Curie was a Polish scientist that specialized in chemistry and physics. She wanted to…

A: Marie Curie  Marie Curie is renowned for discovering radium and polonium, as well as for making a…

Q: he objective of this homework assignment is to expand your knowledge of the atom beyond the models…

A: The Higgs boson is a fundamental particle in the Standard Model of particle physics. It was first…

Q: How many protons and neutrons are in the nucleus of each of the following atoms? In aneutral atom of…

A: The given elements are: a. 79Brb. 81Brc. 239Pud. 133Cse. 3Hf. 56Fe

Q: Which is the most massive (has highest mass)? An atom of oxygen A proton A molecule of hydrogen A…

A: A proton is a subatomic particle that is present in the nucleus of an atom. The number of protons…

Q: Why are atoms electrically neutral? O they have more electrons than protons O they have less…

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Q: Models neutrons can are be used to show the structure of an atom, The protons and clustered aroUnd…

A: The element which was shown in the given model has to be identified.

Q: An atom of sulfur is about four times smaller in mass than an atom of iodine. How many grams of neon…

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Q: Determine the number of protons and the number of neutrons in isotope. 33P15

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Q: A certain element X has four isotopes. • 4.350% of X has a mass of 49.94605 amu. • 83.79% of X has a…

A: From part B, Average atomic mass of element X = 52 amu Mass of electron = 9.1× 10-31 kg mass of an…

Q: A fictitious element name Brickminium can be found as three isotopes. Their relative abundances are…

A: The relative atomic mass (Ar) of an element is explained as the average of the masses of its…

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.