(a) chlorine-35 protons electrons neutrons (b) palladium-104 protons electrons neutrons (c) lithium-7 protons electrons neutrons

Q: An atom of calcium is represented by 12C.. How many neutrons are in the nucleus of this atom?…

A:

Q: Because many ions and compounds have very similar names,there is great potential for confusing them.…

A: The correct formulas of the compounds are -

Q: 3. Oxygen has an atomic number of 8, an atomic mass of 16, and it is neutrally charged.

A:

Q: How many protons, neutrons, and electrons are in an atom of (a) 138Ba, (b) phosphorus-31?

A:

Q: What is isobars and isotopes?

A: Isobars: 1. Isobars are elements with different atomic numbers and the same mass number. 2. Isobars…

Q: During nuclear decay a 238 U atom can break apart into a helium 4 atom and one other atom. Assuming…

A: In the problem statement it is given that 238U undergoes nuclear decay to give a helium-4 atom and…

Q: (b) H2S to SO,² (acidic) Atoms: Oxygen: Hydrogen: Electrons:

A: The given half reaction is  H2S→SO42- in acidic medium.

Q: How much does 4.28 x 10 21 atoms of Nickel weigh?

A: We know that, one mole of any substance contains 6.022 × 1023 atoms. We can determine the weight by…

Q: Explain the concept of Mass spectrometry ?

A: Spectrometry is a practical approach of spectroscopy. It is an application of spectroscopy and deals…

Q: Which of the following are poor conductors of heat and electricity? O Transition elements O Halogens…

A: Elements can be classified into 3 forms, that is metals, non-metals, and metalloids. Metals are the…

Q: In which of these compounds are there twice as many Oxygen atoms as Hydrogen atoms?

A: To find :- The compound having oxygen atoms two times more than the hydrogen atoms.   We can easily…

Q: Tungsten (W) and chlorine (Cl) form a series of compounds with the following compositions:Mass % W…

A: If each tungsten atom contain one atomic mass so, need to determine the number of moles of each…

Q: Cesium has 39 known isotopes ranging from mass 112 to 151. If a sample of cesium containing only…

A: The average atomic mass of any particular element which exists in two or more isotopic forms, can be…

Q: What is identity of an ion having 32 protons, 30 electrons and 40 neutrons?

A: Given : number of protons = 32 number of electrons = 30  and number of neutrons = 40

Q: What is a proton ? what is a chemical?

A: A proton is a subatomic particle which is present in the nucleus of an atom along with the neutrons.…

Q: 2. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. What does…

A: Answer: 75 Proton and 110 Neutron. Given,Element of Rhenium (Re) exist as two stable isotopes and 18…

Q: Give the chemical symbol, including superscript indicating mass number, for (a) the ion with 22…

A: The chemical symbol for any species is written as :   ZXA where Z is the atomic number and A is mass…

Q: An element X has the following masses and % abundance. 35X  (34.97 amu 75.8%) and 37X ( 36.99amu…

A: Answer :- amu (atomic mass unit) - It is the unit to express the atomic mass.  % abundance - It is…

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

A: The Isotopes given are Ce-136(atomic mass=135.907 amu), Ce-138(atomic mass=137.905 amu),…

Q: An element consists of two isotopes and has an average atomic weight of 85.561 a.m.u. The abundance…

A:

Q: The atomic mass of fluorine is 18.998 amu, and its mass spectrum shows a large peak at this mass.…

A: The isotope of fluorine having a mass of 18.998 amu is highly abundant by a very large amount, which…

Q: 2. Water is made of two elements, hydrogen, and oxygen. What possible elements could substitute for…

A:

Q: If the density of indium is 7.31 g/cm', how many atoms are there in a indium piece of 30 dm wide, 5…

A: Density of an element is defined as the ratio of the mass of the element to its volume.…

Q: Glycine, one of the essential amino acids, has two carbon atoms, five hydrogen atoms, twO oxygen…

A: From given  Gylcine has 2 carbons (C2), five hydrogen (H5) 1 Nitrogen (N) and 2 Oxygens (O2) atoms.

Q: A platinum atom has a radius of 177 pm. If you could string platinum atoms like beads on a thread,…

A: Given that, Radius of Pt-atom = 177 pm =177×10-12 m= 177×10-10 cm =1.77×10-8 cm Length of necklace =…

Q: A positively charged particle in the nucleus of an atom is    A. an electron    B. a neutron…

A: A positively charged particle in the nucleus of an atom is given below

Q: Naturally occurring chlorine is composed of two isotopes: 75.76% Cl-35 (mass 34.9688 amu) and 24.24%…

A: The elements having same atomic number, but different mass number are termed as isotopes. A molecule…

Q: When Dalton began his calculations to determine atomic masses he had to make a number of…

A: A compound is a substance that is made of two or more elements. Generally the compound may contain…

Q: 3. What type of substances are magnesium chloride, sodium chloride, and calcium chloride?

A: The question is based on the concept of chemical bonding. we have to identify the nature of…

Q: Hydrogen and oxygen react to form water, together they are a  .... - molecule - compound -…

A: Hydrogen and oxygen are atoms that combine to form water

Q: Deducing Relative Abundance by Semi-Quantitative Reasoning- Without Doing Math How would I go about…

A: More number of neutrons are required for higher atomic number elements to avoid repulsion.

Q: Element X has two naturally occurring isotopes,  65X(isotopic mass  64.7471 amu, abundance 28.49%)…

A: Given : Element X has 2 naturally isotopes. Mass of isotope 65X = 64.7471 amu Abundance of 65X =…

Q: Element "X" has a mass# of 53. How many neutrons does it have if its atomic# is 27

A: According to the answering guidelines, I'm posting the solution for the first question. Kindly post…

Q: B) The average atomic mass of chlorine is 35.453. Does this mean that there are just two stable…

A: In order to explain the answer for the above question we have to first understand the given question…

Q: The density of liquid mercury is 13.69 g/cm. How many atoms of mercury are in a 1.614E1 mL sample?

A: density = massvolume mass = density × volume mass of liquid mercury = 13.69 g/cm3 ×1.614 ×101 mL =…

Q: There are three isotopes of an element, X-28, X-29, and X-30, with relative abundances of 92.2297%,…

A: The mass number of Silicon = 30

Q: The mass ratio of sodium to fluorine in sodium fluoride is 1.21:1. A sample of sodium fluoride…

A: The amount of sodium produced on decomposition of sample NaF is 28.8g. The mass ratio of sodium to…

Q: A fictitious element only has two naturally occurring isotopes: X and Y. If isotope X has a mass of…

A:

Q: Abundance = 74.200%, Mass(u) = 45.95263 Abundance = 14.500%, Mass = 47.94795 Abundance =…

A: The atoms of same elements having identical atomic number but have different masses are termed as…

Q: potassium has three stable isotopes k-39, k-40 and k-41 but k-40 has a very low natural abundance.…

A: K  has 26 number of possible isotopes from 31K to 57K but among them only three are stable isotopes…

Q: An element's most stable ion forms an ionic compound with bromine, having the formula XBr3. If the…

A: Given: 1) Ionic compound with bromine is=XBr3 2) Mass number of an element is = 225 3) Number of…

Q: 2. With a mass spectrometer, it can be determined that the mass 13C/mass 12C is 1.0836129. Determine…

A: Since the Ratio of atomic masses is given we will multiply the weight of 12 C carbon to get the…

Q: How many protons neutrons and electrons are present in a single atom of bromine-79?

A: Since the atomic number of bromine = 35  hence number of electrons = Atomic number = 35

Q: How many electrons and neutrons (n) are in a neutral magnesium-26 atom?

A: Atomic number of a neutral atom is equal to the number of electrons or number of protons present in…

Q: In the periodic table, do the chemical properties change more than through a period or through a…

A: Periodic table is table in which the elements are arranged based on there electronic configurations.…

Q: How many protons, electrons and neutrons does Cl1?

A: In the question, we have been given a halide ion and we need to calculate the number of electrons,…

Q: How many protons, neutrons, and electrons does 79se2-  ion?

A: Se or selenium comes under carbon family. Selenium is a metalloid(an element intermediate in…

Q: The atomic weight of Ga is 69.72 amu. There are 69.0 amu, and Ga, with a weight of 71.0 amu. The…

A: Let the percentage of the isotope 69Ga be =x%Then,The percentage of the isotope 71Ga is =(100−x)%