Which of the following elements are generally the most unstable?   a. Atomic # 1-20 b. Atomic # 20-43 c. Atomic # 44-83 d. Atomic # 83-118

Q: a. Fr-218 decays by alpha decay. What are the atomic symbol and mass number of the product? Product:…

A: Write decay product of the given question---

Q: What is the primary factor that determines whether an nucleus is stable or unstable?

A: The nucleus is the small region that lies at the center of an atom. It is discovered in 1911 by…

Q: An element X occurs as three stable isotopes: X-21, X-22 and X-23. X-21 is 90.48% abundant and X-22…

A: Given : Element X exists as three stable isotopes. The three isotopes are: X-21 X-22 X-23

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: The explosion of an atomic bomb in the atmosphere releases many radioactive isotopes into the…

A: The explosion of atomic bomb occurs as a result of rapid release of energy from a high speed nuclear…

Q: A neutron and a proton combine to form a nucleus why does the mass. Of the nucleus differ from the…

A: Given: A neutron and a proton combine to form a nucleus. And the mass of the nucleus differ from the…

Q: Why are the chemical properties of all isotopes of the same element identical?

A: Atoms of the same element, having same number of protons and electrons, but differing only in the…

Q: What part of an atom is involved in chemical reactions? A. Proton B. neutron C. outermost electron…

A: 1. c Only the valence electrons take part in the chemical reactions. 2. a A huge amount of energy is…

Q: Which of the following particles would attract each other? Would repel each other? Rank the…

A: Opposite charges attract each other while similar charges repel each other. Therefore, electrons and…

Q: 85 11. For the Isotope 38Sr A. What is the atomic number? B. What is the mass number? C. What is the…

A: The given symbol for isotope is 8538Sr A) The atomic number is represented by the subscript.     The…

Q: The nuclear glue that helps bind a nucleus is the? A. Alpha B. Electron C. Neutron D. Proton E. Beta

A:

Q: A sample of element X contains 90% X-35, 8.0% X-37, and 2.0% X-38 atoms. The average atomic mass…

A: The average atomic mass = M1× M1(%) + M2× M2(%) +...... +Mn× Mn(%) / 100. Hence, M1 =35,M2= 37, M3…

Q: An element consists of 1.40% of an isotope with mass 203.973 u, 24.10% of an isotope with mass…

A:

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: The mass spectrometer may be used to A. Electrolyze water B. Detect the presence of isotopes C.…

A: We need to find where mass spectrometry can be used.

Q: The radioisotope carbon-11 will decay through Periodic Table of the Elements hydrogen 1 H 13 14 15…

A: The radioisotope C-11 has 6 protons and 5 neutrons in its nucleus. The n/p ratio = 5/6 ~ 0.833

Q: The element X in a compound was involved in a chemical reaction. After the reaction was completed,…

A: Given: Element X undergoing a chemical reaction.

Q: What pattern do you notice? What's similar about most of the radioactive elements?

A: There is an obvious pattern to look for: Atomic number increases as you move right along a row.…

Q: For the Isotope 8538SrA. What is the atomic number?B. What is the mass number?C. What is the number…

A: a) for 8538Sr  Atomic number = 38  as atomic number is always written in lower left of the element…

Q: - Part C What is the symbol for the isotope of 55 Fe that possesses 31 neutrons? Express your answer…

A: Isotopes are defined as same element having same number of proton but different number of neutron in…

Q: 21. What force holds electrons near the nucleus of the atom? A. Strong nuclear force B.…

A: From the concept of periodic trends of elements and atomic mass of elements the following questions…

Q: What was the Copernican revolution? O A. The discovery that the sun was not the center of the…

A: Copernican revolution is about the model of the solar system and was given by a polish astronomer.

Q: a) When is a neutron unstable? b) If you have a bunch of lone neutrons, what fraction of them will…

A: Given that , Neutrons are unstable.

Q: For the Isotope 6731GaA. What is the atomic number?B. What is the mass number?C. What is the number…

A: The general representation of nucleus and the atomic number and mass number of given element is,

Q: Why is the atomic weight of chlorine 35.4527 in stead of exactly 35

A: Answer:  Since chlorine exhibits two isotopes Cl35  and  Cl37 in 3:1 ratio Hence we will take…

Q: What can happen as nuclei decay? A.The atom will donate protons and neutrons to another…

A: Nuclear decay is the process in which unstable nuclei is converted into stable nuclei by releasing…

Q: atomic number 119 and mass number of 252  where would this element be placed? What period would it…

A: Ununennium   Ununennium, also known as eka-francium or element 119, is the hypothetical…

Q: How to get atomic mass protons electrons and neutrons? How do cation and anion work?

A: Atom consist of a heavy mass in the center which is known as nucleus. Nucleus contains protons and…

Q: Atomic #- 10 Mass #- 20 # of p+ = # of n - # of e-D # of valence e Atom Symbol- Name of Atom

A: Atom contains sub atomic particles  such as  protons , electrons and neutrons

Q: When an atom form from its constituent particles a. energy is released b. energy is destroyed d.…

A: In the reaction, Atom can either form from its constituent particles or an atom can disintegrate…

Q: Visited (Atomic masses: iron-56 = 55.9349 amu; hydrogen-1 = 1.0078 amu; mass of neutron = 1.0087…

A:

Q: 86. the symbol for the atomic number is Z the United States has the largest water footprint of…

A: Given:  Q 86 to 95 for True or False Q 96 to 100 for Matching

Q: Element X has an unstable nucleus due to an overabundance of neutrons. All are likely to occur…

A: Element X has an unstable nucleus due to an overabundance of neutrons. All are likely to occur…

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: 13. 9.62 g of an element contains 0.240 mol. Identify the element. А. В В. Не С. Са D. Zr E. Both Ca…

A: Weight of an element = 9.62 g No. of moles = 0.240 mol

Q: Chiorine exists in natute aga mixture ot stable isotopes ,cl-35 and ct-37:74 the atomic magg of…

A:

Q: Select H, atomic number 1. How many stable Isotopes ofH exist?

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.…

Q: How are elements heavier than helium formed in the stars, particularly until iron?  How are elements…

A: The chemical element helium has the atomic number 2 and the letter He in its name. It is the first…

Q: 1. How do atoms attain stability?

A: Since you are posted with multiple questions. As per the rule, I am answering the first question…

Q: A subatomic particle is located in the outermost shell of an atom. Due to its location, the particle…

A: Atomic structure schematic

Q: How do different isotopes of nitrogen behave similarly or differently from each other in a chemical…

A: Isotopes are elements having same number of protons but different number of neutrons.

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: What is the largest number of protons that can exist in a nucleus and still be stable? 206 50 92 83…

A: To solve this problem we have to know about protons .  In an element atomic number represent the…

Q: It is found that 2.0 x 10-5 mol 222Rn (t1/2 = 3.82 d, atom mass = 222) has seeped into a closed…

A:

Q: Consider the atoms (a) P-31, (b) S-33, and (c) P-33.   From greatest to least, rank them by the…

A: Number of neutrons can be determined by subtracting number of protons from the mass number of an…

Q: In 1909, a team of British scientists led by Ernest Rutherford, carried out the Gold Foil Experiment…

A: Gold Foil Experiment helped to determine the arrangement of particles in the atom.

Q: Determine the missing element 16S------1°e + 35 5---

A: Like all reaction, in radioactive decay reaction mass and charge balance are maintained.