6) the nucleus is a very small region that contains 99.99% off the atoms mass? true or false

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: Explain the difference between Z (the atomic number) and A (the mass number)?

A: Concept introduction: Atomic number and mass number are the basic properties of element. An atom…

Q: 23. What is the percent natural abundance of isotopes?

A: Atoms having the same atomic number but different mass numbers are known as the isotopes of each…

Q: The atomic masses of nitrogen-14, titanium-48, and xenon-129 are 13.999234 amu, 47.935878 amu, and…

A: Given, the atomic masses of nitrogen-14, titanium-48, and xenon-129 are 13.999234 amu, 47.935878…

Q: You have an unknown element consisting of three stable isotopes, one with mass 19.9924 amu (90.48%),…

A: Given that: mass 1 = 19.9924 amu  % of mass 1 = 90.48 % mass 2 = 20.9939 amu % of mass 2 = 0.27 %…

Q: 1s22s22p63s23p4 is what element?

A:

Q: Can we tell the exact mass of a particular atom by looking at the periodic table

A: The periodic table is a table in which a total of 118 elements are placed on the basis of their…

Q: Show that the atomic mass of the element sulfur is 32.065 amu.

A: This question is solved by using the following formula.  mass contribution to Sulfur=(mass of…

Q: 5. A sample of Rb recovered from a nuclear reactor has an unusual distribution of isotopes. If the…

A: Average atomic mass is the sum of products of mass of each isotop and it’s natural abundance. It can…

Q: One atom of Se-77 is 6.410 times as heavy as an atom of C-12. What is the atomic mass of Se-77?

A:

Q: Find the average atomic mass for Li if 7.5% of Li atoms are Li-6 with a mass of 6.0151223 amu and…

A:

Q: 5. Calculate the percent abundance of carbon-14 with a mass of 13.97 u and carbon- 12 with a mass of…

A: We have to calculate the % abundance of two isotopes.

Q: If an atom were 4.5 football fields long, the nucleus would be the size of   a. a grape seed.   b.…

A: Given: Atom is 4.5 football field long To determine: Size of nucleus

Q: Cerium is the most abundant rare earth metal. Pure cerium ignites when scratched by even by a soft…

A: Isotopes are variations of a single chemical element that varies in the number of neutrons and…

Q: A helium nucleus has two protons and two neutrons. How many electrons does it take to equal the mass…

A:

Q: An element has three naturally occurring isotopes. What other information must you know in order to…

A: Natural abundance and mass number of atoms of an element are required for calculation of atomic mass…

Q: What does the nucleus of an atom consists of?

A: In an atom, three fundamental particles are present, proton, electron, and neutron.

Q: There are two naturally occurring isotopes of B- boron. One has an atomic mass of 10.013 amu and a…

A:

Q: The mass of a single niobium atom is 1.54×10-22grams. How many niobium atoms would there be in a…

A: Density is a physical quantity that can be determined with the help of the mass and volume of the…

Q: What does the "(<1%)" in the mass spectrum mean?

A: Mass spectrometry helps us to predict the structure of unknown organic compound on basis of the…

Q: A hypothetical (fake) element has 2 naturally occurring isotopes. Isotope #1 has a mass of 185.8410…

A:

Q: TRUE or FALSE: Isotopes are elements that have a different number of protons.

A: All atoms can be identified by the no. of protons and neutrons they contain. The no. of protons in…

Q: has a mass about the same as that of a proton has a-1 charge is found in the nucleus is attracted to…

A:

Q: Enter your answer in the provided box. The atomic masses of the two stable isotopes of copper,…

A: Average atomic mass is represented by the equation:

Q: Element: Magnesium Number of Number of Abundance Abundance Name of isotope Mass (amu) Protons…

A: Since you have posted multiple questions with multiple sub-parts, we are entitled to answer the…

Q: 13. Which pair represents isotopes? a. He and »He b. seFe and sa:Mn c. Si and suP 14. Which pair…

A: Identify isotopes pair among them --

Q: Describe how the atomic and mass numbers change, with at least one specific example?

A: An atom has a nucleus situated at the center and the electrons are surrounding it. The nucleus has…

Q: A single atom of element Q has a mass of 1.09 x 10 -22 g. What is the name of the element Q?

A: Given : Mass of single atom of element = 1.09 X 10-22 g Assuming atomic mass of element is M.

Q: ny atoms a

A: The number of moles is determined as the mass of the substance upon its molar mass. The number of…

Q: ? + 4Ni→7Rg+¿n Express your answer as an isotope or a particle. 28

A: In a balanced nuclear reaction, number of protons and number of neutrons on either side of the…

Q: a. How many protons are in the nucleus of the isotopeRn-220?b. How many neutrons are in the nucleus…

A: a) The number of protons in the nucleus of Rn-220 has to be given, The number of protons is equal to…

Q: Describe the experiment that provided the basis for ourunderstanding of the nucleus.

A: Describe the experiment that provided the basis for our understanding of the nucleus.

Q: How can we calculate the density of the nucleus?

A: An atom is the basic and fundamental unit of matter. An atom consists of electron and the nucleus in…

Q: What is the mass number of potassium-39? What is the isotope’s charge?

A: Given atom,      Potassium-39   For a neutral atom, atomic number = Number of protons = Number of…

Q: A sample of a new element (X) was found to contain the following mixture of isotopes: 65% X-55, 20%…

A: Average atomic weight is the sum of the masses of the individual isotopes each multiplied by its…

Q: You have an unknown element consisting of three stable isotopes, one with mass = 19.9924 amu…

A:

Q: These isotopes 2. Sulfur exists in nature as three isotopes. If the atomic have isotopic masses…

A:

Q: A certain element with three naturally occurring isotopes is found to have an average atomic mass of…

A: The percent abundance of an isotope is the ratio of the amount of an isotope of an element and the…

Q: Naturally occurring iodine has an atomic mass of 126.9045 amu. A 12.3849 g sample of iodine is…

A:

Q: The mass of one atom of an element is 3.21 x 10-22 g.  What is the atomic mass of this element in…

A: mass of one atom of an element = 3.21 x 10-22 g atomic mass of this element =?

Q: Naturally occurring copper is a mixture of 69.17% Cu@63 with a mass of 62.93 amu and 30.83% Cu@65…

A: Given,Realtive abundance of C63u isotope=69.17%=0.6917Realtive abundance of C65u…

Q: mass е relative (amu) abundance 111.9 90.3% 118.9 9.7%

A: Average Atomic mass = = (M1X1 + M2X2)/(X1+X2) = (111.9×90.3 + 118.9×9.7)/100 = 112.579 amu = 113

Q: What is the mass of the other isotope of Boron given 11B has a mass of 11.0093 amu and an abundance…

A: Isotopes of boron are 11B and 10B. Average atomic mass=∑mass of isotope×Relative abundance %100 Mass…

Q: Consider 39K,   a The mass number (A) is 39  b The atomic number (Z) is 39  c Blank  d The atomic…

A: Representation of an element: XZA X = symbol of element Z = atomic number of element A = atomic mass…

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.