1A (1) 2A (2) ЗА (13) 4A (14) 5A (15) 6A (16) 7A (17) 8A (18)

Q: 1. Platinum ( pt) a. Write the physical and chemical properties of the element above. b. Write the…

A: Please find your solution below :  a. Physical properties : Atomic number = 78 Atomic mass =…

Q: 6. Which of the following is NOT true about the Particle Theory of Matter? * a. All particles of one…

A: Ions can be positive ions or negative ions. Positive ions carry positive charge and negative ions…

Q: Consider the diagram below. 21 23 5x + 35° 25 26 45° 28 Which of the following is the value of x? A…

A: When parallel lines get crossed by another line ,corresponding angles are equal .

Q: At death, a nobleman in ancient Egypt was mummified and his body contained 1.4 x 10-3 g of…

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Q: Classify the following elements as a metal, nonmetal, and a metalloid. 1.) hydrogen…

A: Metal is the element that readily forms cations and shows properties like conductivity, luster,…

Q: II. Tell whether if the following is an example of solid, liquid or gas. Write S for solid, L for…

A: Since you have posted multiple questions, we will solve only first question for you. If you want any…

Q: Find the density of a neutron star with a mass of 1.97 solar masses and a diameter of 13 km, and…

A: Conversion units: 1 solar mass = 1.989×1030 kg 1 fm = 10-15m 1 km =1000 m 1 amu = 1.66×10-27 kg…

Q: 5. For scientists who are looking for life in outer space, what substances should they look for and…

A: As you already mentioned in the question that you want answer only question number-5 -…

Q: According to the conservation of mass and energy law, which of the following is TRUE of mass and…

A: The law of conservation of mass and energy is similar for both the entities and is a law which…

Q: Measuring the mass and volume of a piece of chalk is a way of investigating its _____. A.Chemical…

A: 1. We need to check if mass and volume are intensive or extensive properties and if they relate to…

Q: a. 25.9% N, 74.1% O b. 43.4 % Na, 11.3% C c. 18.8 % Na, 29.0% C

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

Q: For each of the following elements, write its chemical symbol, locate it in the periodic table, and…

A: (a) Silver  Symbol = Ag Position = 5th period, 11th group It is a metal (b) Helium Symbol = He…

Q: 'wrले लबकेबै (लि मुरकतकी कल् उ.।13 तकe्य ्भी काटोरे निवाण्र (ए Wान्न कन कर लाck्ये इर--8 s8. 698ाm

A: Answer: Given data: Moles of Nickel n=3.13mol Molar mass of Nickel M=58.69g/mol

Q: 11. Mrs. Folloso is preparing water in containers to sell in their water station. A. filtration B.…

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Q: List the Elements required by Living Organisms?

A: To find: The elements required by Living organisms

Q: On=3,0=3,me=3 and ms=-1/2 n=5,l=3,me=-2 and ms=+1/2 O n=1, l=0,me=1 and ms=+1/2 On=1, l=0, me=0 and…

A: We have to predict not allowed set of quantum number.

Q: The car is in motion. a. Newton's First Law Newton's Second Law Newton's Third Law

A: (a.) Newton's first law Newton's first law states that, If a body is at rest or moving at a constant…

Q: "C→ 14 14 6. 7.

A: The given reaction is an example of β- decay. It is a type of nuclear reaction, which emits an…

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: Provide the atomic symbol for each of the following elements: (a) calcium, (b) carbon, (c) hydrogen,…

A: Atomic symbol of an element is an abbreviation which is used to represent it and generally consists…

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

A: We know that red colour has highest wavelength so it has lowest energy

Q: Antinomy, Sb, has 2 isotopes and an atomic weight of 121.75 amu. The isotope anitimony-121 has a…

A:

Q: A sample of 7.000 g of nitrogen can be combined with 8.000 g of oxygen to form nitric oxide gas…

A: In NO, the ratio of moles of N and O is = N : O = 1 : 1. Hence 1 mole of NO contains 1 atom of N and…

Q: Locate each of the following elements in the periodic table;give its name and atomic number, and…

A: Metals are those substances or minerals which forms naturally below the surface of the earth. They…

Q: cess silvér ñiti mass of Cl an

A:

Q: Identify the following as a heterogeneous mixture, a homogeneous mixture, a compound or an element.…

A: An element is a pure substance which is made up of only one kind of atoms while a compound is a…

Q: ! 1 ső: F1 6 Q 5 ОН 3 CH2OH OH 2 ** F2 W #3 ОН 1 2 ОН 80 F3 E $ 4 a F4 R 07 8⁰ % 5 16 T A 6 MacBook…

A: ->An anomeric carbon can be identified as the the carbon bonded as the carbon bonded to the ring…

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

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

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Q: Use data from Appendix C, Figure 7.10, and Figure 7.12 to calculatethe lattice energy of RbCl.

A: The Born–Haber cycle is purposed the calculation of reaction energies with the help of ionization…

Q: The radioactive carbon is known as:  a. Carbon 12 b. Carbon 14 c. Carbon 13 d. Carbon 15 *This…

A: Isotopes are the elements which have same atomic number but different mass number. Radioactive…

Q: What is correct from multiple choice

A: Since the symbol of Hydrogen is H and not He Hence option b is correct answer

Q: a) 14N → 14C + 222FF+ b) 226 Ac → 22²Fr + c) 9°y → + -9ß d) 133CS + -iß →_ +y

A: Given : Different type of reactions  To find : missing part in the reactions Solution : As we know…

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: A) S B) Sn C) Sb D) As

A: As we know,in the periodic table,  same group elements show similar properties

Q: The kinetic energy of subatomic particle is 5.85 x 10-25 J and its mass is 5.1 x 10-31 Kg. What…

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Q: 241 a. 05Am + He → 23n + b. 226RA 88Ra → He + c. - + dn Ba + 564 36 Kr + 3n 235x 129p 94

A: Since you have posted question with multiple subparts as per guidelines we can answer only three per…

Q: NOTRECLE MEGATINCU MQATUN SNBREUM NEREGY EVELL

A: Given terms: NOTRECLE MEGATINCU MQATUN SNBREUM NEREGY EVELL

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

A: The given equations have to be complete,

Q: Give the symbol for each element. a. calcium, a nutrient needed for strong teeth and bones b. radon,…

A: a. Calcium, a nutrient needed for strong teeth and bones = The symbol of the given element is Ca.

Q: Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 fm…

A:

Q: The mass of the pycnometer with water is 30.5 g, while the mass of the pycnometer is 36.5 g. What is…

A: The mass of pycnometer with water = 30.5 g The mass of the pycnometer = 36.5 g The mass of water =…

Q: Which of the following elements is NOT a metal? A) arsenic B) indium C) iridium D) lithium E)…

A: Arsenic is a metalloid and we can say it a metal.

Q: The mass of a proton is 1.67 × 10-27 kg. What is the mass of a proton in  gigagrams? Giga     G…

A: Given ,  Mass of proton = 1.67 × 10-27 kg = 1.67 × 10-27 × 103 g = 1.67 × 10-24 g [ * 1 kg = 103 g ]…

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: Give the noble gas shorthand notation (ex: [He] 2s2 2p1) for Br       Give the noble gas shorthand…

A: Electronic confirmation of heavier element is expressed in various ways. Their internal shell is…

Q: Earth’s surface area is 5.10x10^8km², and its crust has amean thickness of 35 km and mean density…

A: Determine the volume of crust and total mass of crust of earth in metric tons using its density.…