Explain how it is possible for one element to have a higher atomic number than another and yet have a lower atomic mass, for example,   element                       atomic no.                   atomic mass                                         K                                 19                                39.10                                      Ar                                 18                                39.95

Q: 5. Fluorine (F) atomic number is 9. It has 10 neutrons. It is on the 2nd period and has 7 valence e.…

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

Q: Use the atom builder interactive to arrange each atom or ion by mass number. Largest mass number…

A: Mass number: The atomic mass of elements depends on the number of protons and neutrons. The total…

Q: which of the following statements is not part of Dalton's original atomic theory?  all atoms of one…

A: According to Dalton's atomic theory, Atoms are indivisible. i.e. there is no subatomic particles…

Q: Periodic Table of the Elements CI Mn Te I Xe lodine would have chemical properties most like which…

A: This is the long form of the periodic table which consists of horizontal rows called periods and…

Q: Element: Se 76 Mass number: Number of neutrons: Number of protons: Number of electrons: charge: 2-…

A: In the case of a neutral atom, Number of protons = Number of electrons = Atomic number Negative…

Q: Write the atomic symbolAZX for each of the isotopes described below.a. number of protons = 27,…

A: Since you have posted multiple sub-parts, the answer for first three sub-parts are given below.…

Q: atomic weight

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Q: Ammonia is a gas with a characteristic pungent odor. It is sold as a water solution used in…

A: The atomic mass of N relative to H in a sample of of ammonia contains 7.933 g N and 1.712 g H, it is…

Q: What is the mass of each sample? a. 2.75 mol of Fe b. 0.115 mol Al c. 125 mol Si d. 1 Ni atom

A: MASS- Mass is basically defined the quantity of matter in the object. It is measured in grams and…

Q: Which element has a chemical properties that are most similar to potassium? Cesium Sulfur Nitrogen…

A: The vertical column of the elements which are present in the periodic table is known as groups. Each…

Q: 55. Which elements are main-group elements?(a) Te(b) K(c) V(d) Re(e) Ag

A: The main- group elements are the elements in the s-block and p-block of the modern periodic table…

Q: Fill in the table below Species Protons Neutrons Electrons Electron Configuration 97MO4+ 65C.

A: The table is filled as follows: The number of protons in an atom= atomic number of that atom The…

Q: There are electrons and +2 neutrons in the ion of Cd Atomic number: 48 Mass number : 112 O A. 46, 48…

A: Given ion,    Cd2+ ion    Mass number = 112    Atomic number = 48

Q: What is the atomic mass of Sulfur?* O 16 O 64.12 32.07 What is likely to be the most common isotope…

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Q: The element magnesium has three naturally isotopes. Given the following information, calculate the…

A: The data given is,

Q: an element is a mixture of two isotopes. one isotope of the element has an atomic mass of 34.96885…

A: In this question, we want to determine the Average atomic mass and after that we will Identify the…

Q: Classify each of the following fifth-row elements as a metal, a metalloid, or a nonmetal: (a) Y (b)…

A: The metals are elements that are aligned left side of the periodic table and have a tendency to lose…

Q: Group the elements into pairs that would most likely exhibit similar chemical properties. It does…

A: Chemical properties of any element depends on the number of valence electron the element is having.…

Q: The atomic mass of an element is equal to one-twelfth of the mass of a carbon-12 atom. a weighted…

A: ◆ One-twelfth the mass of C-12 atom is Atomic mass unit.

Q: What is mass number of a N atom that has 10 neutrons? O 14 O 18 O 12 21 O 10 9. O 17

A: Given that, No. Of neutron in N atom = 10 Then,

Q: 20. The atoms of the elements in Group 2 have the same (1) mass number (2) atomic number (3) number…

A: Both answer is given below

Q: Each element: has unique physical properties O has unique chemical properties O is made of a single…

A: Element :- It is a pure substance consisting of same type of atoms that all have same number of…

Q: A sample of the element Phosphorus is shown to have a mass of 33 and å charge of -3. HoW many…

A: Neutral Phosphorus having mass 30.9 P having mass 33. Atomic number of P is 15, also atomic number…

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: DO NOW: Describe the process happening in this image in as much detail as possible (complete…

A: The given nuclear reaction is,   86222Ra  ----------> 84218Po +       24He    • However,  Ra is…

Q: Amazing news! Chemists have just discovered a brand new element on an asteroid. Calculate the…

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Q: Fill in the table. Element Number of Protons Number of Neutrons Number of Electrons Mass Number…

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Q: Which element is not a main-group element?a) Se                      b) Mo                     c) Sr…

A: Main-group elements: S-block and P-block elements are knows as main-group elements. They are,…

Q: Potassium imparts a ________________color under the cobalt glass test. light green carmine red…

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Q: Which of the following elements is largest in atomic size? A) Ba B) Ca C) Mg D) Be

A: The atomic size or radius of the element is said to be the distance from the nucleus of an atom to…

Q: Write the element symbol that fi ts each description, using a superscript for the mass number and a…

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

Q: An ion has a mass number of 208 and an atomic number of 82, hov many electrons does it have if the…

A: Introduction- Negatively charged particle is an electron. The total number of electrons in an atom…

Q: In chemical reactions, sodium (Na) is more likely to behave similarly to which element?   a.…

A: Chemical properties of the element depends upon the valence shell electronic configuration. Elements…

Q: 15 If an element has 26 protons and 23 electrons: a.    The element forms a cation b.    Two of the…

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

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Q: What is the differences between an Oxygen atom (16 amu, atomic number = 8) and a Calcium atom (46…

A: Oxygen atom = 16amu Calcium atom = 40amu  Metal- it have tendency to lose electron. Non metal - it…

Q: Element Atomic number Mass number p+ е- 1. Не 1. 1. F 1. 1.

A: In an element, Atomic number = number of protons Atomic mass or mass number = number of protons +…

Q: Which one of the following species has a many electrons as it has neutrons? Select one: а. 14с b.…

A: In the nuclide symbol of an atom, Z-represents the atomic number which is number of protons present…

Q: 93. Which pair of elements have chemical properties that are the most similar? c. Cobalt and Copper…

A: The periodicity in the properties of the elements i.e, repetition of certain chemical properties of…

Q: Three unknown species (referred to as X, Y, and Z) have the following properties. Proton Neutron…

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Q: In nature, the noble gases exist as A the sulfides B) the gaseous fluorides c) monatomic gaseous…

A: There are 6 naturally occurring Noble gas elements: He, Ne, Ar, Kr, Xe, Rn

Q: The number of neutrons in an atom determines the type of element it is true or false

A: Given True/False  Statement:-

Q: cobalt atomic number 27 how many protons electrons and neutrons in isotope CO- 63

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Q: A certain isotope X3+ contains 25 electrons and 40 neutrons.  What is the mass number for this…

A: Here, given #electron=25  #neutron=40 #proton=?   Mass number is the sum of protons and neutrons.…

Q: Group I (the alkali metals) includes lithium (Li), sodium (Na), and potassium (K). These elements…

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Q: Boron consists mainly of 19.9% boron-10 and 80.1% boron-11. What is the average atomic mass (amu) of…

A: The average Atomic Mass of Boron is given by -

Q: What is the name and symbol of the element?

A: Atomic number = number of protons  Mass number = number of protons + number of neutrons

Q: The atomic number indicates the total number of neutrons and protons in a nucleus the number of…

A: #1) For an neutral atom        Atomic No. = No. Of protons OR No. Of electrons         mass no. =…