The most expensive material in the world because of the difficulty in isolating it, is/are ____:  a. diamonds b. moon dust c. outer space -vacuumed d. uranium *Choose only one answer

Q: The number of nearest-neighbor atoms of an atom is called its O a. sequence number O b. system…

A: We need to tell in the question about what we called  to the number of surrounding atoms to the…

Q: 25) Which nonradioactive group I metal would be the most reactive in water and why? A) Cesium would…

A: 25) Cesium belongs to group I of the periodic table having only one electron in the outermost shell.…

Q: How does plasma make a campfire flame orange ?

A: Plasma is an ionized gas which has charged ions (positive ions, free electrons); otherwise described…

Q: Metal workers designed best alloys. Where can the development of modern chemistry be traced to

A: Alchemists laid the groundwork for modern chemistry by conducting experiments and recording the…

Q: Some scientists have suggested that life on other planets in the universe may be based on silicon…

A: Given: Some scientists have suggested that life on other planets in the universe may be based on…

Q: A. Write the complete electron configuration for Cl- ion. B. What element is the electron…

A: A. Periodic table represents the systematic arrangement of elements in which the properties of these…

Q: a. Which is larger? i. F Be or

A: Atomic radius specifies the size of the element. It is the distance from center of the nucleus to…

Q: (a) Why is calcium generally more reactive than magnesium?(b) Why is calcium generally less reactive…

A: a.

Q: Give reason for each of the following : (a) Molten alumina is a poor conductor of electricity. (b)…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Đ1. Docs the charge of the material remain the same when paired up with other material? 02. What is…

A:

Q: D- A sample of non-pure magnetite( Fe304) weighed 0.5g convert by the chemical reaction to Fe203…

A:

Q: Assign reasons for each of the following :(i) Transition metals generally form coloured…

A: In periodic table, four main blocks are there. These are s block, p block, d block and f block.…

Q: When Au comes into contact with Ag, it creates a solid solution that is called a substitutional…

A: Given: mass of Au = 10 % mass of Ag = 90 % Pure Au has a density of 19.32 g/cm3  pure Ag has a…

Q: Electrons in a strong magnet....

A: ANSWER

Q: SICI4 has the lowest bp in comparison with group IV element tetrachloride Ta F.b

A: False.

Q: Fluorescent compound

A: Answer: the reaction product of thiochrome  formation is fluorescent compound.

Q: What are the rare earth elements?

A: Elements is a term that is used in chemistry for a substance i.e. pure and which consists of atoms…

Q: Which types of magnetic materials are used to make permanent magnets?

A: There are various types of the magnetic materials such as paramagnetic material, diamagnetic…

Q: What is Bioinorganic chemistry?

A: Certain metal ions are involved in the biological reactions that place inside the living organisms.…

Q: Radioisotopes are used in   LEDs   some food preservation processes   some glow-in-the-dark paints…

A: Radioisotopes are the unstable form of an element that emit radiation to transform into a more…

Q: ISC

A: This question is a fill in blank.

Q: 24. The name and chemical formula of your favorite aci is

A: Acid are the substance which donate protons or accept electrons.

Q: Calculate and compare the number of strands of PVA in 1.00 L of 4% PVA and the number of…

A:

Q: which group of metals are most reactive metals? How many valance electrons does this group of metals…

A: The metals are electropositive. Metal atoms donate electrons easily. The amount of energy required…

Q: 21 20 JgVI Jaåll :The application of (N-8) rule for group IV elements indicate That silicon is…

A: Octet Rule: Octet rule states that an atom which has eight (8) electrons in its valence shell is…

Q: Draw the LEDS , then determine the Geometry/Shape of Ozone. Give a very short explanation.

A: In this question, we have to Draw the Lewis dot structure, then determine the Geometry/Shape of…

Q: at is the significance of knowing the properties of elements (periodic table) in the food industry…

A: There are certain elements like carbon , oxygen, hydrogen etc which are used in food industry as by…

Q: Make the structure based on the Blomstrand-Jorgensen Theory and Werner Theory also calculate the…

A: Effective atomic number (EAN): According to this rule,the ligands donate t+ electrons to the central…

Q: Give reasons:(a) Platinum, gold and silver are used to make jewellery.(b) Sodium, potassium and…

A: (a) Platinum, gold and silver are used to make jewellery.  The reason for the above is Platinum,…

Q: l Mc, EHHER

A: Applying concept of organic synthesis

Q: please answer this question correctly. 1. What is the configuration for sulfur after it has…

A: Sulphur has the atomic number : 16 Electronic Configuration : 2,8,6

Q: Explain the Shielding and Deshielding Effects ?

A: When the hydrogen atom is surrounded by higher electron density it creates greater opposition to…

Q: A DIAGNOSTIC TEST 39 59. Which data must be collected to calculate the enthalpy of reaction? (A)…

A:

Q: stringent health are needed for- tor materials.

A: one of the most important properties of semiconductor materials is that their conductivity can be…

Q: 6)

A:

Q: Unknown mystery salt (lead)?

A: Here we have to say salt name of unknown mystery salt and its flame color-

Q: Why do we identify minerals? What do minerals tell us?

A: A mineral is a natural inorganic compound or element that has characteristics structure and chemical…

Q: 70 LABORATORY REPORT Chemistry of Cells d. A molecule formed by an ionic bond is shown below. Using…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Look at equation 11: If Br,(g) + 2KCI (aq) reacted instead of CI, (g) + 2KBr (aq) could this…

A: Cl2  + 2e- → 2 Cl-     E° = 1.36 VBr2  + 2e- → 2 Br-     E° = 1.09 VBr2 (g) + 2 KCl(aq) → 2Br-  +…

Q: 30 Sodium carbonate is a vital component of the glass manufacturing industry. (a) By referring to…

A: Sodium plays crucial role in marking glass.Sodium lime glass is made of 70 percent silica and 15…

Q: d) Discuss the advantage of aluminium and magnesium over steel in industrial applications. How could…

A:

Q: How many shielding electrons does carbon have?

A: Shielding or screening effect -When the number of inner electrons is greater, they shield the…

Q: The atomic radius for radioactive radon (Rn) is Density for radioactive radon (Rn) is Boiling…

A: Radon is an element having atomic number 86. Its symbol is Rn.

Q: what is the usage of hinsberg test in daily life?

A: For the Hinsberg test, benzenesulfonyl chloride is used as reagent, Hinsberg's reagent.

Q: Silver ions are classified as a heavy metal, while sodium ions are not.  Using this information,…

A: Heavy metals are metals that have relatively high densities, atomic weights, or atomic numbers. The…

Q: Is bort a diamond?

A: Bort is used as a abrasive coatings for drill bits, grinding wheel and for cutting stones.