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

Q: MCQ 13: The element of group IV which is metal is A. Carbon (C) B. Germanium (Ge) C. Lead (Pb) D.…

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Q: Mrs. Smith showed her class three elements and described their properties. Properties of Elements…

A: The data given is,

Q: Which of the following is a part of Dalton's atomic theory? Group of answer choices Atoms are almost…

A: Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and…

Q: Which elements are alkaline earth metals?(a) rubidium(b) tungsten(c) magnesium(d) cesium(e)…

A: Alkaline earth metals are the elements present in the group 2 of the periodic table. Their general…

Q: A specific isotope of an element is known to have 15 protons and 16 neutrons. Which symbol would…

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Q: Chlorine is a halogen (Table 2.3). Locate this element in the periodic table.(a) What is its…

A: Chlorine is a halogen. Chlorine is the second halogen in the periodic table. It lies before the…

Q: Which of the following pairs of elements do you expect to be most similar? O nitrogen and oxygen…

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Q: In which group on the periodic table is Cobalt? O Halogen O Alkaline earth metal Noble gas O Alkali…

A: Solution Cobalt, like iron, may be attractable and then is employed to form magnets. it's alloyed…

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: What do these four elements have in common? Hydrogen (H) be Oxygen (0) 4e 2e Carbon (C) Na 2e 1e Be…

A: We are given structures of 4 elements we need to describe which thing is common to all.  In an atom…

Q: Write the names and symbols for four elements in eachof the following categories: (a) nonmetal, (b)…

A: (a) Nonmetals are the elements which are present at the right of the periodic table. For example,…

Q: Give the name, atomic symbol, and group number of the element with each Z value, and classify it as…

A: Since you have posted multiple subparts, the answer for first three sub-parts are given below.…

Q: 1. Write the three characteristics of metals and nonmetals. Metals Nonmetals 2. List the subatomic…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: Read each description in the first column of the table below. If any chemical element with atomic…

A: All known elements are placed in the long form of the periodic table. There are 18 vertical columns…

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: 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: 21. The elements in Group 7A are known by what name? A. transition metals B. halogens oli m D.…

A: Group 7A of the periodic table consists of the elements: fluorine (F), chlorine (Cl), bromine (Br),…

Q: An element is a pure substance that is made up a ____ type of ato

A: An element is a pure substance that is made up an identical type of atom.

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: Which two elements on the periodic table are in the same period? O Sn and Rb O K and Ba O F and Cl O…

A: The periodic table is divided into 18 groups and  7 periods.(i)  The 18 vertical columns that goes…

Q: Compare the elements Mg, N, O, Be with regard to the following properties: You may need to use the…

A: The elements given are Mg, O, N and Be.

Q: When trying to identify an unknown element, a scientist determines what other elements the unknown…

A: To identify the unknown elements, its chemical properties should be studied.  Chemical properties…

Q: What is the symbol for the lightest alkali metal with three neutrons? Select one: a. H b. Li c. B…

A: Lithium Lithium is an alkali metal with the atomic number = 3 and an atomic mass of 6.941 g/mol.…

Q: Be sure your answers have the correct number of significant digits. mass natural isotope Ox10 (amu)…

A: The average atomic mass of element is equal to the product of the masses of the isotope and its…

Q: Potassium occurs naturally as two isotopes. The heavier isotope has percentage abundance of 93.1.…

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Q: 10. Fill in the following answers: a. Give the complete symbol for an anion of nitrogen with 8…

A: when electron is removed from gaseous parent atom then cation is formed and when electrons are added…

Q: 2. Fill in the blanks. symbol element capital atom lowercase two solid a) All mater is made up of…

A: All questions are based on general inorganic chemistry related to definitions.

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: 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: Identify each of the following elements: a.member of the same family as oxygen whose most stable ion…

A: (a)Oxygen belongs to group VI of the periodic table. Tellurium is the member of this group only with…

Q: 3. Which statement accurately describes the atoms of a specific element? A zinc, Zn, atom contains…

A: Number of protons  = Atomic number Number of electrons= Number of protons Neutrons and protons lie…

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: 2. Which of the following best describes an element? a. A neutral substance consisting of a cation…

A: Element is a substance which consists only of atoms having same atomic number and hence same…

Q: Which of the following elements fo Gold O Fluorine Hydrogen Sulfur Oxygen O Helium Olodine Antimony…

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Q: Complete the following: 1. For each of the positive ions listed in column 1, use the periodic table…

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Q: What are the names of all the elements in this chemical reaction and which are metals and none…

A: Elements are classified into 3 types 1) Metals :- These are highly electropositive in nature . They…

Q: Which statement is incorrect? Elements are building blocks for compunds. An atom is the smallest…

A: The detailed explanation of the given statements is as follows:   Statement true/false…

Q: Which of the following statements is always true? A All representative elements are nonmetals. All…

A: In the periodic table, the elements present in 1, 2, and 13 to 18 groups are known as representative…

Q: Which two elements on the periodic table are in the same period? OH, Na O B, Ga OK, Sc He, Ne

A: Which two elements on the periodic table are in the same period = ?

Q: Which of the following statements best describes the elements in Group 8A (18) of the periodic…

A: The elements in Group 8A (18) are : Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe) and…

Q: Using the periodic table, classify each of the following elements as a metal or a nonmetal, and then…

A: Using the periodic table, classify each of the following elements as a metal or a nonmetal, and then…

Q: Which of the following has more protons than neutrons?     12C     1H     24Mg2+     22Ne

A: Atomic number (Z) is defined as number of protons present in an atom.  Mass number (A) is the sum of…

Q: In which group on the periodic table is Iron? O Alkali metal O Halogen Alkaline earth metal O…

A: A multiple choice question based on the position of Iron in periodic table.

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: Give the symbol of the element described by each of the following: a. Group 5A (15), Period 3 b. the…

A: All the elements either present in the nature or man-made consists of a specific number of protons,…

Q: Most of the elements in the periodic table are O metals O non-metals O metalloids gases

A: Metalloids - Elements which have properties intermediate of metals and non-metals.  Metals - They…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.