What is the relation betwen iron and copper?

Q: O 6 L O 7L 8L 9 L O 10 L О 12L O 14 L О 16L O none of the above

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Q: Why is Visible radiation able to remove electrons from sodium but not from zinc?

A: Photoelectric effect: It states that the when light falls on a metal surface it emits electrons.…

Q: QI: How the Van Der Waals bonds arise between atoms?

A: Van Der Waals bond: It is a weak force of attraction between electrically neutral atoms which pass…

Q: How many valence electrons in each?  Isotopes: 28Si4- Protons_____ Neutrons_____ Electrons_____

A: Write the expression of neutron and proton. Mass number=Neutron+Proton Write the expression of…

Q: Does water of crystallization alter the properties of a substance?

A: Does water of crystallization alter the properties of a substance

Q: Polonium, the Period 6 member of Group 6A(16), is a rare radioactive metal that is the only element…

A: The density of the unit cell is given by,

Q: Which characteristic tells you an element is likely a non-metal? Has a shiny/metallic luster Not a…

A: Which characteristic tells you an element is likely a non-metal  .The non-metals are elements on the…

Q: How do ionic compounds appear to our eye?

A: Ionic compounds consist of oppositely charged ions that are held together by bond known as ionic…

Q: An alpha particle is: 'n Alfa-deeltjie is: OA. a helium atom with two electrons removed / 'n…

A: 19) An alpha particle is produced from a radioactive nuclei during a radioactive decay. Two protons…

Q: Laser ablation is an effective tool for probing micro areas of solid samples. How does it work?

A: The mechanism of laser ablation depends on physical properties of metals and environment medium.…

Q: This is #4 on the worksheet. How much energy will a 2.5 W laser use in 12 seconds? Your answer: O…

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Q: State what most a particles being straight on suggests about the structure of the atoms in the metal

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Q: Rotation of Fluid Elements 4.86 PQ What is meant by rotation of a fluid element? Use a sketch to…

A: What is meant by roation of a fluid element. Use a sketch.

Q: How many electrons in the outermost shell of an atom doe a good insulator have?

A: The insulator is the material which does not conducts electricity. The electricity is only conducts…

Q: Who first explained Brownian motion and made a convincing case for the existence of atoms?

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Q: Name the radiation which can be detected by a solution of silver chloride?

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Q: When was the first photocopier made?

A: Photocopier is the  machine which is used to save time and money on creating carbon copies of…

Q: What is the principle of corresponding states?

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Q: The physical region of interest is divided into elements and element types and appropriate…

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Q: The atom in its natural state is electrically negative charged. True or false, justify your answer

A: The atom in its natural state is electrically negative charged. False statement. The positive…

Q: write 10 physical significance of half subtractor

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Q: Iron has an atomic number Z=26, a relative atomic m iron, assuming that each atom contributes two…

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Q: What are the workings of a selenium photocopier?

A: Selenium is used extensively in electronics as selenium has good photovoltaic and photoconductive…

Q: This process produces NADPH. * Light Deaction

A: NADPH plays a crucial role in some of the chemical reactions that make up for the process of…

Q: What results from an unequal sharing of electrons between atoms?

A: Electrons are carriers of charges.

Q: Can gold be created from other elements ?

A: Gold is element whose atomic number is 79 and is represented by the symbol Au (which is the short…

Q: Compare this value with a standard value. Compute the percent difference between the two and discuss…

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Q: Find the percentage by mass of the elements in strontium sulfide SrS (to the nearest 1%) Omit the %…

A: The molar mass of SrS, strontium sulfide is 119.685 The atomic mass of strontium is 87.62 so the…

Q: What would the atom below do to become an ion?

A: When an atom accept eletron or reject electron then the atom become an ion. We know the the number…

Q: how much charge is present in a container havinf 1 atom of hellium

A: SOlution:

Q: Calculate the amount of time it would require for 1eV of energy to be absorbed by an atom in a metal…

A: Given,

Q: what role does openness to new ideas play in the development of the concept of atom?

A: The ancient Greek philosophers Democritus and Leucippus recorded the concept of the atomo, an…

Q: What accounts for the difference in penetration ability with regard to the type of emission and the…

A: Different Types of radioactive emission: Alpha rays Beta rays Gamma rays

Q: How many types of atoms can you expect to find in a pure sample of any element?

A: Step 1To find the number of atoms in a given sample, we need to find the number of moles of the…

Q: Why do lasers have so many varied applications?

A: Why do lasers have so many varied applications.

Q: Why does ink from ordinary fountain pen spreads if water is spilled on a page written with it.

A: Fountain pens rely on a combination of gravity and changes in air pressure to write on paper that is…

Q: According to the Bohr model, what may happen when an atom gains?

A: Energy of electron changes when an atom gains or lose energy.If atom gains energy it jump from…

Q: RECTANGU LAR BLOCK Of CARBON IS SHOWN. L:3cm a=2mm b=2mm V= lOV

A: The length of the block L=3 cm=0.03 m The area of cross section of the block…

Q: What is electrophorus?

A: Electrophorus is invented by Jhoan Carl.

Q: Who advanced the idea of atoms in the early 1800s?

A: In the early 19th century, a chemist named John Dalton first formulated the first atomic theory.

Q: Cite evidence that the idea of opposites as components of a wholeness preceded Bohr’s principle of…

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Q: Which type (analog or digital) is more likely to degrade as you make copies?

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Q: Sketch the atomic structure of silicon and insert an impurity of arsenic as demonstrated for…

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