he most abundant elements in our food and drinks are oxygen, carbon, hydrogen and nitrogen. Why is it logical that these elements would be found in the food and drinks we consume?

Q: Identify which of the following statements about elements and their abundance is false? O a. Most…

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Q: If you wanted to make an accurate scale model of the hydrogen atom and decided that the nucleus…

A: Answer :

Q: Which of the following exists in nature as a diatomic molecular element?  Group of answer choices…

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Q: Which one of the following elements is a poor conductor of heat and electricity? iron lead fluorine…

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Q: Search the web or your textbooks for an illustration of Mendeleev’s periodic table. How many…

A: Given : Mendeleev periodic table  To find : Describe it properly Solution : There are thousands of…

Q: What is the molecular mass of Sodium hydroxide given by the chemical formula “NaOH”. Atomic masses…

A: According to the question the chemical formula of sodium hydroxide is "NaOH"  Molecular mass is the…

Q: In the table below, there are descriptions of an experiment on samples of three different chemical…

A: Given that : We have to identify whether the elements are metal or non-metal form the given…

Q: Which statement is true about elements? An element is made of only one kind of atom Water is a…

A: An element is defined as substance which contains same type of atoms, and no other atoms. Has a…

Q: Suppose we have three hypothetical atomic nuclei: A, B, and C. Nucleus A has 3 protons and 4…

A: According to the question, we have three hypothetical atomic nuclei:A, B, and C. Nucleus A has 3…

Q: John Dalton developed an atomic theory from which our current theory was built off. Which of the…

A: Dalton atomic theory is on the basis of law of conservation of mass , i.e mass can neither be…

Q: Determine the number of protons and neutrons in each of the following isotopes. 223 Rn 86 Express…

A: We can obtain the number of neutron upon subtracting mass number with number of protons.

Q: One atom has 15 protons and 16 neutrons in its nucleus, with 15 electrons traveling around it.…

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

Q: 1. Describe the periodic table. 2. Where are the alkali metals and the halogens located on the…

A: Modern periodic table was first made by Dmitri Mendeleev. He is known as the father of periodic…

Q: Compare the amount of copper predicted in part A with the amount measured in part B. What percentage…

A: Predicted copper amount=0.9918 Actual amount of copper produced= 0.72

Q: A sample of compound X (a clear, colorless, combustible liquid with a noticeable odor) is analyzed…

A: Given information, compound X - 14.13 g carbon and 2.96 g hydrogen compound Y - 19.91 g carbon and…

Q: Which of the following statements is NOT correct according to Dalton's atomic theory? O A. A sample…

A: Dalton is the name of the scientist who gave Dalton's atomic theory.

Q: Name a minimum of five elemental materials, some personal and some around your house, that you make…

A: Five elements that are not chemically changed from their natural states through regular uses are-…

Q: What is the symbol for the isotope of "Fe that possesses 31 neutrons? Express your answer as a…

A: To find: The symbol of the isotope of  55Fe which posses 31 neutrons.

Q: Carbon can react with hydrogen to form several different compounds. Two compounds that contain only…

A: Law of multiple proportions relate the mass number of reactants.

Q: Which of the following could describe an element?   I II III All of them None of them

A: Matter: Matter can be defined as any component which occupies space and has mass.

Q: Predict the chemical formula for the ionic compound formed by the elements Sr and Cl. 3. Predict the…

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Q: Set I Set II Set III Не Na Kr N As Na O Ar Au Si H P Rb Pd Не Pd

A: • Since, the elements having same outer electronic configuration in their atoms are arranged in…

Q: If a fictitious element, X, has 2 naturally occurring isotopes; X-44 and X-46.  The atomic mass of…

A: Given: Fictitious element, X, has 2 naturally occurring isotopes; X-44 and X-46.  The atomic mass of…

Q: Carbon has several isotopes including 12C and 14C. These isotopes differ in the number of:   a.…

A: Isotopes , elements which have same atomic number but different molar mass . And we know that…

Q: A. TRUE OR FALSE. Write T before each number if the statement is correct statement is incorrect. anu…

A: Note : As per our guidelines ,we are supposed to answer only first question (Section A) ,Kindly…

Q: 1. Describe the periodic table, 2. 3. Where are the alkali metals and the halogens located on the…

A: #1: A periodic table is a tabular arrangement of elements in form of rows and columns in increasing…

Q: Which of the following statements about subatomic particles are true, and which are false? Drag the…

A: Any atom is made up of 3 subatomic particles. 1) electron  2) proton  3) neutron

Q: Elements of which of the following groups on the periodic table always occur naturally as monatomic…

A: The groups given are, A) Noble gases B) Halogens C) Chalcogens  D) Pinctogens E) Group 4 A (14)…

Q: Below is a list of properties of elements. Classify them as a property of metals, nonmetals, or…

A: Properties of Metals : Conduct heat, shiny, solids at room temperature, ductile, high melting point,…

Q: write the word or words that best complete each statement. The natural magnet discovered by the…

A: Following are the appropriate answers of the given questions.

Q: Is the underlined part of the macroscopic domain, or the microscopic domain of chemistry ? A carbon…

A: The term macroscopic refers to the objects that can be seen by the naked eyes. Macroscopic is just…

Q: In the table below, there are descriptions of an experiment on samples of three different chemical…

A: Properties of metal  •  Lustrous  • High melting point and boiling point.  • Malleable - They can be…

Q: Three sections of the periodic table are labeled A, B, and C in the image below. (IT CAN ONLY BE…

A: The portion of periodic table given is as shown below.

Q: Part 1: Vocabulary Define the following terms: (from what you remember from middle school) Matter:…

A: Answer for part 1 Matter It is the substance of which any physical object consist. Atom It is the…

Q: TRUE for non-metal elements? Non-metals do not conduct electricity well Non-metals are represented…

A: Yes non metals do not conduct the electricity well as because they do not have/posses free electrons…

Q: There are protons, neutrons, and electrons in 147₁ Hs+5

A: Atom is composed of three subatomic particles, which are electrons, protons and neutrons.  Protons :…

Q: true or false (h)  All atoms of the same element have the same number of electrons.  (b) All atoms…

A: h) All atoms of the same element have the same number of electrons. The given statement is False.…

Q: Let’s say you were doing an experiment on two different chemicals in two different test tubes. One…

A: The completion of a chemical reaction is indicated by several means. One of the means which is used…

Q: . Zinc has 2 isotopes and has an atomic mass of 65.39. one of the isotopes is 64.23amu (26.0%). what…

A: As per our guidelines , we can only solve first question. Please resubmit other questions as next…

Q: Discuss the role of Cyrus the Great in the establishment of the Achaemenid (Persian) Empire and the…

A: Cyrus was the founder of Achaemmenid empire.His empire was started from Aegan Sea to Indus river.…

Q: The element oxygen has three naturally occurring isotopes, with 8,9, and 10 neutrons in the nucleus,…

A: The isotopes has the same atomic number but different atomic masses.

Q: Which of the following elements is not a representative element? O Nickel Cadmium Silicon O Barium

A: I A, IIA, IIIA, IV A, VA, VI A, VII A, VIII A elements are called representative elements. Between…

Q: A sample of compound A (a clear, colorless gas) is analyzed and found to contain 4.27 g carbon and…

A: Given: For compound A Mass of carbon = 4.27 g Mass of oxygen = 5.69 g For compound B Mass of carbon…

Q: The process of iron combining with oxygen to form rust is considered a chemical change because rust…

A: Rusting It is an oxidation reaction. The iron reacts with water and oxygen to form hydrated…

Q: Name a minimum of five elemental materials, some personal and some around your house, that you make…

A: Many metals and non-metals are used in our everyday life.

Q: record the element names, chemical symbols, and atomic numbers for the following 14 elements along…

A: As per the Q&A guidelines I am allowed to answering the first three sub-parts of a question. So,…

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: 1) indicate whether the following properties are representatives of a metal, semi metal, or non…

A: The elements that have a lustrous appearance and the high conducting property are known as metals.…

d-Block Elements

According to the modern form of periodic table, 118 elements are present which are subdivided as four blocks, namely, s, p, d and f-block elements based on the entry of the valence electron or last electron into which orbital.