What is protoscience and pseudoscience? What is atomic theory?

Q: Should the elemental symbol for lead be written as Pb or PB? What confusion could arise if the wrong…

A: Elemental symbol for lead is Pb and it should be Pb .

Q: In the following drawing, the green spheres represent atoms of a certain element. The purple spheres…

A: The left side of the reaction has one green element and two blue elements because they are of two…

Q: HNO3 NBS H,SO4 light AICI3 Fe HCI

A: Chemical reaction:

Q: Where have you seen elements, atoms, ions, etc in real life? Where did you see them and what were…

A: Elements present in the periodic table can be seen all around us in our day to day life.  Elements…

Q: For questions 42 thru 60, consult the attached Periodic Table of the Elements.  Please do NOT Google…

A: Valence shell The outer most shell of an atom is called valence shell. The electron shells are…

Q: Explain about the Indivisible: The Atomic Theory

A: The “indivisible: the atomic theory” was proposed and put forward by English chemist Dalton.…

Q: Naturally occurring cobalt consists of only one isotope, 58.9332. A synthetic radioactive isotope of…

A: From given data;  Initially % of 60Co is determined and then weight of 60Co is calculated as…

Q: What is Joseph Proust contribution atomic theory?

A: He first published his Law of Definite Proportions (or Law of Constant Composition). The essence of…

Q: 1. Models come in many forms including physical, 2-dimensional, conceptual, computer, and…

A: Given: Two dimensional models, conceptual, computer and mathematical models To find: scientist use…

Q: Why is it important to study atomic theory?

A: Matter is composed of small particles . Atomic theory tells about the particles and refereed them as…

Q: Explain John Dalton and the Atomic Theory?

A:

Q: What four fundamental assumptions about atoms and matter make up modern atomic theory?

A: Introduction:     All matter is composed of atoms. Atom is a smallest indivisible particle that…

Q: what philosophy you believe, the atomism or the natural elements? Why?

A: Atomism Is a philosophical concept. It propose that physical univers is composed of invisible…

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

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

Q: A common belief among scientists is that there exists anunderlying order to nature. Einstein…

A: Science can be developed and applied on whatever possible by humans. But there are some underlying…

Q: Dalton theorized that matter is made of tiny invisible particles called atoms. in what way did the…

A: The most significant of all the Dalton’s investigations were related with the atomic theory.…

Q: Which is a compound? A. A piece of pure zinc metal B. A molecule made of nitrogen and oxygen C. An…

A: Compound: A molecule consisting of two different elements is called compound

Q: Explain how Dalton’s atomic theory offered a convincing explanation of the observation that mass is…

A: The parameter by which Dalton's atomic theory provided appropriate explanation of observation that…

Q: The volume of a single iridium atom is 1.04x10-23 cm³. What is the volume of a iridium atom in…

A: Given: Volume of iridium in cm3 = 1.04 X 10-23 cm3.

Q: What is relative abundance

A: Given question is :  What is relative abundance = ?

Q: Magnesium constitutes about 2% of Earth’s crust and has three naturally occurring isotopes. Suppose…

A:

Q: Let a triangle represent atoms of element A and a circle represent atoms of element B.a. Draw an…

A: A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture.…

Q: Do you think that heat and light have mass? Do they occupy space? Why

A: Mass: It is the quantity that represents the amount of substance or matter present. It is typically…

Q: explain how the development of the Atomic Theory illustrates the Nature of Science. Support your…

A: It is asked to explain the development of atomic theory illustrating the nature of Science.

Q: What is the volume of a molybdenum atom in microliters?

A: 1 cm3 = 1 mL  1 mL = 0.001 L  1 mL = 1000 microliters

Q: Tennessine has two naturally occurring isotopes.  Tennessine-293 has an atomic mass of 292.9498 and…

A: Given  Atomic mass of Tennessine -293 ( m1 )  = 292.9498 amu Atomic mass of Tennessine - 296 ( m2 )…

Q: When working in the lab, I take the mass of a sample of ammonium (NH3) and I find it to have a mass…

A: The mass of ammonia is = 45.74 g The mass of nitrogen is =? The mass of hydrogen is =?

Q: Three sceintists that particpated in the discovery and invention or contributed to the early atomic…

A:

Q: The vitamin niacin (nicotinic acid,C6H5NO2) can be isolated from a variety of natural sources such…

A:

Q: chemical properties?

A:

Q: C;HO2 15 1 09 3H.t J=7 2 27 2H.9 J=7 110 1H,brd s

A: Given is 1HNMR spectra

Q: How do the molecules of a compound differ from the moleculesof an element?

A: Molecules are group of atoms where the atoms are held together by a chemical bond. They can result…

Q: Which methods separate a mixture according to the size of the particles? distillation and…

A: Given: To identify the methods which separate the mixture based on the size of the particles.

Q: What is the Principle of Constant Proportions?

A: Principle of constant proportion is also known as as law of definite proportion. It says that the…

Q: At some point in the future, nuclear chemists have synthesized two stable isotopes of bohrium.…

A: Since average mass of the element is given so we can easily calculate the fraction of each isotope…

Q: Classify each statement as an observation, a law, or a theory.a. Chlorine is a highly reactive…

A: Law: A descriptive generalization about how some aspect of the natural world behaves under stated…

Q: True or false is an atom is the smallest building block of matter

A: False

Q: The 3rd postulate of Dalton’s Atomic Theory is consistent with a Law developed by a French scientist…

A: 1st atomic theory is proposed by John Dalton, That talks about atoms and it's properties, named as…

Q: Volume occupied by electrons Nucleus Part A containing protons and neutrons- What is the approximate…

A: The diagram given is,

Q: What is Leucippus contribution atomic theory?

A: Matter can be defined as any substance that has some mass and occupy space. Matter can be solid,…

Q: Ca^2+ and S^2- as a chemical formula

A:

Q: B C +1 n=1 D n=2 n=3 n=4 n=5 n=6 O A O B O C O D

A: Use formula from Bohr model to find energy- E = -2.17×10-18[(1/nf)2-(1/ni)2 ] Where nf is the…

Q: j. 1630 + 1630 → k. 6228NI + 'on →. I. + *2He → 63 29Cu + °1B

A: The given equations have to be complete,

Q: K. K* ,ca, and ca 2+ a) Ca?+ とk*Kト Ca とド*とKL Ca LK L b) K" ト ズト CaZt L Ca C) KL K* Lca L Ca2+ D)…

A: The periodic trend of size is as below : Atomic size decreases from left to right along a period.…

Q: Explain in your own words, by writing a short paragraph, how the atomic theory predicts the law of…

A:

Q: Methane and ethane are both made up of carbon and hydrogen. In methane, there are 12.0 g of carbon…

A: According to the law of multiple proportion; When two elements are combined to each other and form…

Q: What is the mass of 1.6 x 1021 neon atoms?

A:

Q: What type of light is used in a TV remote control?     What is the mass number of the radioactive…

A: 1. A remote has an Infrared (IR) transmitter led which uses IR light to transmit you input to TV…

Q: 31. Which of the following parts of Dalton's theory were proven incorrect with newer versions of…

A: Some points about Dalton's atomic theory :  1)Dalton's atomic theory was the first complete attempt…