Which of the following contains two species which have the same mass number?   14C, 14N   12C, 13C   both a and b   neither a nor b

Q: Isotopes are defined as atoms ofa. the same element with different numbers of protons.b. radioactive…

A: Atoms of the same element have the same number of protons, which is also called the atomic number.

Q: Calculate the average atomic mass of uranium given its naturally occurring isotopes and their…

A:

Q: 13. Mg has three stable isotopes. Given a sample of Mg with the following m. percent abundances:…

A: Average atomic mass = ?

Q: How many protons and neutrons are present in an atom of 45/21A5Sc

A: The above is isotope of Scandium.

Q: Gallium occurs naturally as 69Ga and 71Ga. Given the mass and abundance of gallium-69 (68.92 amu…

A: Given, Gallium occurs naturally as 69Ga and 71Ga and mass and abundance of gallium-69 is 68.92 amu…

Q: Which element does not belong with the other four? 20Ca 19K 34Se 79Au 40Zr A) Ca    B) K    C)Se…

A: Atomic number of given elements  1. Calcium  has atomic number 20. 2. Potassium has atomic number of…

Q: The type of subatomic particle that has a low mass, has a negative charge, and whirls around the…

A: In atomic structure electron moves around the nucleus.

Q: A bromine atom has an atomic number of 35 and an atomic mass of 80. What is the structure of this…

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: Isotope a mass amu nd Li with a mass of 7.0160040 amu. What are the percent isotopic abundances of…

A: Let there is x percent abundance of 6 Li and 100-x percent abundance of 7 Li

Q: What is the atomic mass of oxygen-16 (15.9949 Amy) at 99.757%

A:

Q: uppose a new element is discovered and it has two stable isotopes. One isotope has a mass of 73.372…

A: When an element has more than one isotope, then we will take average atomic mass to calculate…

Q: Write the isotopic notation for an isotope that has an atomic number of 35 and a mass number of 81.

A: Given   Atomic Number   = 35    Mass   Number  =  81  Isotopic Notation     = ?

Q: What is the atomic mass of boron-12? A. 13.00335 amu B. 4.00260 amu C. 18.99840 amu D. --…

A: Since boron has atomic number = 5  Hence number of electrons in boron = 5 and to become neutral atom…

Q: A certain element consists of two stable isotopes. The first has an atomic mass of 106.9051 amu and…

A:

Q: Which of the following is an isotope of Manganese - 55? A) 55Mn B) 55Fe C) 95Mo+2 D) 54Mn

A: The species of an element which differs in the mass number is said to be isotope.  Atomic number of…

Q: Silver has an atomic mass of 107.868 amu. The Ag-109 isotope (108.905 amu) is 48.16%. What is the…

A: Isotopes are the elements with different atomic mass (mass number) and same atomic number. Here…

Q: The following table presents the abundances and masses of the isotopes of germanium. What is the…

A: Calculation of atomic weight of germanium:

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: Relative abundance and atomic mass of the naturally occurring isotopes of hafnium: 5% - 176 amu 19%…

A:

Q: Which demonstrates the existence of isotopes? a. 18 Ar and K b. ºC and EN c. 23 Th and 23 Th d. 7Z1…

A: Isotopes : Two or more forms of the same element that contain same atomic number (same number of…

Q: Many hospitals use radioisotopes for diagnosis and treatment or in palliative care. Three…

A: 25. Given that : We have to give the proper symbols of the following elements along with their…

Q: Which of the following describes an atom that is not an isotope of the other two? And why a)14p,…

A: Which of the following describes an atom that is not an isotope of the other two?

Q: A particular element exists in two stable isotopic forms. One isotope has a mass of 62.9296 amu…

A: Mass of one isotope (A) = 62.9296 amu.Abundance = 69.17% = 0.6917.Mass of second isotope (B) =…

Q: 39.) In the gold foil experiment, Rutherford used alpha particles He2+ (mass number 4) to bombard a…

A: An alpha particle is a radioactive particle that is made up of two protons and two neutrons. It is a…

Q: Which of the following statements concerning an 131I atom and a 131Xe atom is / are CORRECT? (1)…

A:

Q: Element X has two isotopes, 28Q and 30Q. The relative atomic mass of X is 28.24. (a) Define the…

A:

Q: What element is defined by the following information?    p+=20  n ^o=20   e^-= 20

A:

Q: Write the isotopic symbol for Lead-206.

A: • We need to write the isotopic symbol for Lead-206

Q: One isotope has an atomic weight of 408.5 atm and a percent abundance of 23.0% while the other…

A: To calculate the atomic weight of the element, multiple the percent abundance with respective weight…

Q: 28. Which of the following descriptions in incorrect? (1)A proton has a positive charge and is…

A: To find: The false statement: (1)A proton has a positive charge and is located in the nucleus (2)A…

Q: 26. An element has 2 stable isotopes. The mass of one is 68.9257amu and its abundance is 60.4%. The…

A: The average atomic mass of an element is equal to the average of individual isotopic masses…

Q: Mg has three stable isotopes. Given a sample of Mg with the following masses and percent abundances:…

A: Average atomic mass is the ratio of total mass of isotops divided by total abundance.

Q: Naturally occurring titanium exists as five stable isotopes. Four of the isotopes are: 46Ti with a…

A: The mass of the fifth isotope of titanium can be calculated as

Q: An element (M) has two stable isotopes and has an average atomic mass of 85.1 au. One of the 87M,…

A: Given that,  Average atomic mass of element Mm = 85.1 au Atomic mass of one isotope 87Mm with 27.8%…

Q: On the periodic table of the elements, mercury (Hg) has an atomic number of 80 and a mass number of…

A: The atomic number of Hg = 80 Mass number of Hg = 200.59

Q: Isotope 25Mg2+ has: Number of protons Number of neutrons Number of electrons Mass number

A: Given :-  25Mg2+  To calculate :-  number of protons  number of neutrons  number of electrons  mass…

Q: Copper has two stable isotopes with the following atomic masses: copper-63 (atomic mass = 62.9296…

A: Given: average atomic mass of copper = 63.546 amu atomic mass of copper-63 = 62.9296 amu atomic mass…

Q: Arrange the isotopes of sulfur and phosphorus in order of decreasing the number of neutrons.

A:

Q: 10.Write the appropriate Isotopic symbol for each of the following isotopes: •Z = 74, A=186 Z= 80,…

A: Z represents atomic number of element  And A represents  mass number of an element.  It represents…

Q: Which of the following has a different number of neutrons? a.123Sb b.125I c.120Cd d.122In

A: Which of the following has a different number of neutrons?

Q: An aluminum atom has an average diameter of about 3.0 * 10- 8 cm. The nucleus has a diameter of…

A: Given, average diameter of aluminum atom = 3.0 x 10-8 cm            diameter of nucleus = 2.0 x…

Q: A particular element exists in two stable isotopic forms.  One isotope has a mass of 36.9659 amu…

A: By using this formula we can calculate the average (atomic) mass of the element .

Q: A certain element consists of two stable isotopes. The first has a mass of 68.9 amu and a percent…

A:

Q: 1. explain the hazards and uses of Carbon-14 (radioactively isotope). 2. Calculate each of the three…

A:

Q: Gallium has an atomic mass of 69.723 amu. The Ga-69 (68.926 amu) is 60.11%. What is the amu of the…

A:

Q: A hypothetical element has two stable isotopes: one isotope has a mass of 106.9051 amu with an…

A: We have to calculate the average atomic mass of element.

Q: Naturally occurring uranium has three isotopes. Calculate the atomic mass of uranium with these…

A:

Q: The list provided is the correct number of neutrons in each of the following isotopes: (B 10, Hg…

A: The atomic number of an atom is the number of protons present in the atom. For a neutral atom, the…

Group 14 Elements

The following elements come under group 14 of the periodic table.