13. Which pair represents isotopes? a. He and »He b. seFe and sa:Mn c. Si and suP 14. Which pair represents isotopes? a. Ca and wK b. sFe and seaFe C. 2389:U and 239U

Q: Lithiu 6.941 9.10 37 Rb 47 r tals ids Be Beryllium 9012 S B M Magne 83 131 R Rall Name 12.01 An…

A: We are given: density of mercury = 13.6 g/mL weight (mass) = 26.8 grams volume =?

Q: Bromine has two naturally occurring isotopes, Br-79 and Br-81. Given that on the planet Saturn the…

A: To determine which of the isotope is the most abundant on Saturn.

Q: The element cubidium (Rb) has two isotopes. 85 Rb. has an Otomic maS3 Of 84.911789 87 Rb has an…

A:

Q: How did they describe atoms in around 450BC?

A: Democritus was the first person to give the concept of the existence of an 'atom'. He was a Greek…

Q: 9. What 9. What is the difference between a molecular element and an atomic element? List the…

A: Element is a substance which cannot be broken down into simpler unit.It is purest form any…

Q: 8) What kind of formular is C,H,O, consider as? A) Empirical formula B) Moleculr formula C)…

A: Protons and neutrons are present inside the nucleus and electrons are revolving around the nucleus…

Q: ilicon has three common isotopes, with the masses and isotopic abundances shown elow: licon-28 --->…

A: Given-> M1= 27.98 u.        P1=0.882% M2=28.98u.           P2=0.018% M3=29.97 u.

Q: Carbon exists as 3 isotopes. It is 88% C-12, 1% C-13 and 11% C-14. What is the average atomic mass…

A: average atomic mass= isotop% multiplied by atomic mass /100

Q: Briefly explain (i) Thompson Experiment OR (ii) Rutherford Experiment emphasizing the discovery(ies)…

A: E. Rutherford discovered protons which are positively charged sub-atomic particles. J. J. Thompson…

Q: What do all isotopes of an element have in common? How do they differ? Provide an example to explain…

A: Each element of the periodic table has an atomic number and mass number. The atomic number is…

Q: Q2 :- answer the following questions There are two 612C Different atom of carbon 613C And Ra-What is…

A:

Q: & The other form of isotope notation is known as Add Text Here 9. For each isctope, write it in the…

A:

Q: Which of the following pairs represent isotopes? A) ²⁸Si and ²⁸Si⁴⁺ B) ²⁸Si and ²⁸Al C) ²⁸Si and…

A: Isotopes basically mean the same element having the same number of proton but with the different…

Q: (c) Calculate the mass percent of protons in the nucleus of each of these isotopes. % of protons in…

A: The isotopes given are 105B and 115B.

Q: What are isotopes? What is the percent natural abundance of isotopes?

A: Isotopes are stable as well as radioactive in nature.

Q: How are isotopes of a particular element alike? How are they different?

A: Isotopes are atoms of the same element that have different numbers of neutrons but the same number…

Q: 1. What is the name of John Dalton's theory? 2. What are elements made of? 3. An atom of hydrogen…

A: As you have posted a question with multiple parts, we will solve the first three parts for you. To…

Q: Explain how the existence of isotopes is related to the fact that atomic masses are not whole…

A: Isotopes: Compounds that are having same atomic number but the different mass number is called…

Q: Suppose a new element is found on an extraterrestrial planet, element J. Element J consists of two…

A:

Q: 13. Which of the following are isotopes? a. P3- and Ar b. 1251 and 127| c. O and O2- d. Na* and K*…

A: b) 125I and 127I

Q: how many protons and neutrons are in 37Cl?

A: The answer to the following question is given as -

Q: Where are particles with virtually no mass found in the atom? A. The electron cloud B. Inside the…

A: Ans  A)  The electron cloud .

Q: Tungsten is a rare metal found naturally on earth almost exclusively combined with other elements in…

A:

Q: In what way are isotopes of a given element always different? In what way(s) are they always the…

A:

Q: The isotope of Nitrogen with a mass of 15amu is written as _? The isotope of Uranium with a mass of…

A:

Q: To the right is a representation of 50 atoms of a fictitious element called westmontium (Wt). The…

A: No. of atoms of each isotope are as follows: Wt-296 (red) 36 Wt-297 (blue) 2 Wt-298 (green)…

Q: ow many protons does aluminum (Al) have? How many neutrons? How many electrons?

A: Aluminium  atomic number = 13  Electronic  configuration  of aluminium = 1s22s22p63s23p1

Q: 5.) Usina ave rage atomic massos elenents ai125 carbon for ,calculatie the meess of each atoms b.5…

A: ***As per Bartleby's guidelines, I can solve only the first three questions. You can resubmit the…

Q: natural abundance mass isotope (amu) [% [% "Li 6.0151 "Li 7.0160

A: Atomic mass is the mass of one atom of an element. As an element can have numerous isotopes, the…

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: Copper has two naturally occurring isotopes with atomic masses of 62.9296 u (C u) and 64.9278 u…

A: When two atoms have same atomic number and different atomic mass, such atoms are called isotopes.…

Q: The nucleus of an atom accounts for most of the size and mass of the atom. O very little of the size…

A: According to Dalton's atomic theory, compound is formed by combining elements and it's also based on…

Q: The existence of isotopes violates one of the original ideas of Dalton’s atomic theory. Which one?

A:

Q: 24 - Which of the following refutes Dalton's statement: "The smallest building block of an element…

A: Dalton proposed his theory in 1808 in which he said that atom is the basic unit of matter and also…

Q: Boron occurs naturally as 10B and 11B. Which isotope is most abundant? (Refer to the Periodic…

A: The isotopes can be described as the types of the species which have equivalent atomic number…

Q: 2. Use the following isotopes to answer the following 17 F, 9 135 Cs, 55 100 Sn, 50 214 Po 84 Sr, 38…

A: The stability of a nucleus depends on the ratio of the number of neutrons to the number of protons…

Q: (a) Assuming the dimensions of the nucleus and atomshown in Figure 2.10, what fraction of the volume…

A: In order to find the fraction of the volume occupied we first write down the given data: From the…

Q: How many isotopes does this element have?

A: From the graph, it is cleared that the number of isotopes of the unknown element is 5.

Q: Which I'm not part of dalton atomic model ? Elements are composed of minute, indivisible particles…

A: Given statements,         Elements are composed of minute, indivisible particles called atoms…

Q: Give a Characteristics of an Atomic?

A: Solution-   An atom has three subatomic particles The nucleus has a well-charged atomic center and…

Q: Antimony has many uses, including infrared devices and as part of an alloy in lead storage…

A: We have the representation of element in which at bottom left you have known atomic number and at…

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

A:

Q: 1. A solid circular cone made of pure platinum (d = 21.45 g/cm3 ) has a diameter  of 2.75 cm and…

A:

Q: ow to describe isotopes in my own words

A: By using definition of isotopes.

Q: Silicon has three naturally occurring isotopes: 92.23% of Si-28 with an atomic weight of 27.9769…

A:

Q: Which statements are inconsistent with Rutherford’s nucleartheory as it was originally stated?…

A: According to  Rutherford’s, the atom has a tiny, massive core and it is called as nucleus. The…

Q: How are isotopes of an element identical to one another? How are they different from one another

A: Isotopes of an element is defined as atoms of same element having different mass Number but same…

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.