Define atomic numberand mass number.Which can varywithout changing the identity of the element?

Q: Explain the important distinctions between eachpair of terms:(a) cathode rays and X-rays(b) protons…

A: Hi, since you have posted questions with multiple subparts. We will answer the first three subparts…

Q: How many electrons make up 0.75 coulomb of charge?

A: The charge of electrons is quantized. The charge on one electron is given by: charge on one electron…

Q: Use the information given below to calculate the average atomic mass of element X.

A: The data given is,

Q: Is the statement consistent with Dalton’s atomic theory as it was originally stated? Why? Lead atoms…

A: Given, Lead atoms can be converted into gold.

Q: Approximately how many times greater is the diameterof an atom than the diameter of its nucleus?…

A: Atoms are bigger in size and in the center of the atom nucleus is present.

Q: What element is found in period 4, group 4A? Use the atomic symbol to identify the element.

A: Given : Period of element is 4  Group of element is 4 A.

Q: An element 'A' contains 4 protons, 4 electrons and 5 neutrons. it is + 1. It becomes when it has 4…

A: For a neutral atom, the number of electrons or protons is equal to its atomic number. The mass…

Q: How many isotopes of chlorine exist in nature?

A: The element chlorine has two isotopes, chlorine–35 and chlorine–37.

Q: Describe the atom and its components.

A: atoms are the smallest things in the universe and could not be divided. We know that atoms are made…

Q: Describe the structure of an atom, including the charge of each subatomic particle.

A: Atom is the basic unit of matter it consists of a heavy positive mass at its center called the…

Q: What principle in constructing the periodic table used the atomic number as basis rather than the…

A: The study of elements and their compounds can be made easy by a systematic classification of…

Q: Describe Thomson’s model of the atom. How might it account for the production of cathode rays?

A: To find: The Thomson's model of the atom.  How might it account for the production of cathode rays

Q: Explain the role of atomic number in determining the identity of an atom.

A: Atomic number(Z) is may be defined as the number of protons present in a neutral(uncharged) atom,…

Q: What provides the atomic mass? O number of the individual particles in the individual atom of an…

A: Basic definition and formula of atomic can determine the protons and neutrons because of..... A= Z+…

Q: Show how the mass spectrometer could be used to determine the relative atomic mass of an atom

A: Introduction: Mass spectrometer is a technique that is used to measure the mass to charge ratio of…

Q: The mass number of an element is equal toa. the mass of its atom’s protons and neutrons.b. the mass…

A: An atom consists of three sub-atomic particles named electron, proton and neutron. The mass of an…

Q: A. What is the mass number of an atom of Iron ( atomic number 26) with 32 neutrons?  B. Is this…

A:

Q: The diameter of a U.S. dime is 17.9 mm, and the diameter of a silver atom is 2.88 A° . How many…

A: The diameter of a U.S. dime is 17.9 mm = 0.0179  meter  diameter of a silver atom is 2.88 A°  =…

Q: An atom of gadolinium has an atomic number of 64 anda mass number of 153. How many electrons,…

A: Gadolinium element belongs to the F-block element with the atomic number 64 and atomic mass 153 g.…

Q: Only two isotopes of copper occur naturally, 63Cu (atomic mass = 62.9296 amu; abundance 69.17%) and…

A: It is given that :Atomic mass of 63 Cu = 62.9296 amuNatural abundance of 63 Cu = 69.17 %Atomic mass…

Q: 1) a. Define mass number of an atom with examples. b.what is nucleus and electron of an atom?

A: Mass number is  the sum of the numbers of protons and neutrons present in the nucleus of an atom.

Q: What is the atomic weight for the element that is in group 5A and period 4?

A: given: group 5A period 4

Q: n element consists of 1.40% of an isotope with mass 203.9730 u, 24.10% of an isotope with mass…

A: Given that, Element consists of 1.40% of an isotope with mass 203.9730 u, 24.10% of an isotope with…

Q: 1H, 2H, and 3H are examples of ________ because they have different numbers of ________.…

A:

Q: Which atomic particles are electrically charged? (a) electrons and neutrons (b) neutrons and protons…

A: Given, Which atomic particles are electrically charged?(a) electrons and neutrons(b) neutrons and…

Q: Magnesium has three isotopes with mass numbers 24, 25, and 26. (a) Write the complete chemical…

A: Atomic number (Z) is defined as a number of protons present in an atom.  In a neutral atom number of…

Q: Define atomic mass

A: The basic unit of matter is an atom. The physical and chemical nature of an atom is defined by its…

Q: Determine the number of subatomic particles of an atom given its mass number and

A: Either one of the thing is given atomic mass/ atomic no/ no of electron/proton/neutron or  name or…

Q: with an atomic weight of 29.9738 amu. On the basis of these data, confirm that the average atomic…

A: We need to find the average atomic weight on the basis of given weights and percentage composition

Q: What is the most common ion of Lithium? How many neutrons does it have?

A: Most common ion of lithium = ?  Number of neutrons in this ion = ?

Q: In ions why not separated by mass only and  why not separated by charge only?

A: Mass spectrometer works in four stages which is ionisation, acceleration, Deflection and detection.…

Q: Boron (B) has two naturally occurring isotopes: boron-10 (abundance = 19.8%, mass = 10.013 amu) and…

A: An atom consists of protons along with the neutrons which occupy the nucleus and the electrons which…

Q: What element is x? O Mercury O Bromine O Rhodium O Xenon O Ytterbium

A:

Q: Why are electrons not considered in determining the mass number of an element?

A: Welcome to bartleby !

Q: Calculate the mass, in grams, of a single platinum atom (mpt=195.08amu)

A: Atomic mass of platinum is 195.08 g/mol.

Q: The symbol and atomic number of the lightest metalloid in Group 4A are:

A: Silicon (Si) is the lightest metalloid of Group lVA and its atomic number is 14.

Q: The radius of a Niobium atom is 143 pm(b) The mass of a single niobium atom is 1.54×10-22 g. Suppose…

A: Given here,the radius of a Niobium atom is = 143 pm1 pm = 1e-12 m1 m = 100 cmSo,Diameter of 1…

Q: define atomic number and atomic mass? Who discovered the concept of atomic numbes?

A: The atomic mass of an element is defined as the total mass of one atom of an element. Its unit is…

Q: Which of the following elements would you expect to have similar properties? As Te Ar Sn He

A: The element present in the same group of the periodic table has the same chemical properties. The…

Q: The atomic radii of the isotopes of an element are identical to one another. However, the atomic…

A: 1. Isotopes of an element have the same atomic number but different mass numbers. For example:…

Q: Bronze medals are made from an alloy composed of 93.8% copper, 5.1% tin, and 1.1% zinc (measured by…

A: Given : Mass % of copper = 93.8 % mass % of tin = 5.1 %  and mass % of Zinc = 1.1 % Assuming 100 g…

Q: Atoms of different elements can have the same mass numbers.   True   False

A: an element have same mass numbers but have different atomic numbers is known as isobars.

Q: What is the difference between the mass number and the atomic number of an atom?

A: Mass number represents the sum of protons and neutrons present inside the nucleus of an atom.

Q: (a) Define atomic number and mass number. (b) Which of these can vary without changing the identity…

A: a)Atomic number (Z) is defined as the number of protons present in the atom.Mass number is defined…

Q: Write the complete symbol, including mass number and atomic number, for each atom? Contains 15…

A: The atomic number of an element is the number of protons in the nucleus of an atom or it is the…

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.