For an atom to be electrically neutral, it must have the same number of:   a. electrons and neutrons   b. electrons and protons   c. neutrons and protons   d. neutrons only   e. electrons, neutrons, and protons

Q: In 1808, John Dalton proposed a series of statements regarding the atom that became known as…

A: Given, Five statements of Dalton's atomic theory is given -     Required,                   Among…

Q: 4. What is a chemical formula? List some examples

A: Introduction: Introduction: Compounds are formed by the combination of two or more elements in a…

Q: D what is the mass of aluminunm Oxide Hoti9e almoD produced fom 174a AGn ganose (N) oxide cole a4…

A: Mass of MnO2 = 1.74 g  We need to determine mass of Al2O3 formed.

Q: In a lab experiment, 7.64 g of phosphorus reacts with bromine to form 66.77 g of phosphorus…

A: law of constant composition:-  a chemical compound always contains its constituent elements in fixed…

Q: a. How many carbon atoms are in the sam b. How many hydrogen atoms are in the s c. How many oxygen…

A:

Q: Oxygen is a _______ and therefore _______ when it forms an ion   A. nonmetal;       loses…

A: Oxygen is a nonmetal element.

Q: Electrons may transfer from  a) atoms of barium to atoms of chlorine b)atoms of sodium to atoms of…

A: We have to predict the option for which  electron transfer is possible.

Q: The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the…

A: To find the average atomic mass, summing the masses of the elements isotopes, each multiplied by…

Q: A hydrate of magnesium sulfate has a mass of 13.52 g. The sample is heated until no water remains.…

A:

Q: A given compound always contains the same proportion (by mass) of the elements. This principle…

A: A compound is formed by the combination of two or more elements through chemical bonding.

Q: Help me with understanding how to calulate mass for A1 and A2

A: Molarity = mole of solute(mol)volume of solution (L)Mass of compound = moles × molar mass1mL =…

Q: Use Rutherford's gold-foil experiment to answer each of the following: How did the results differ…

A: Rutherford experiment He made to strike fast moving alpha particles with the gold foil. He expected…

Q: Use an example to explain why we say that an atom is thesmallest unit of a substance

A: Atom It is smallest particle unit of matter that retains all chemical properties of the element. It…

Q: Calculate the number of atoms in sample. 2.26 g Hg

A:

Q: A sample of aluminum foil contains 4.50×1023 atoms.4.50×1023 atoms. What is the mass of the foil?

A: Given,  Number of atoms of Al foil = 4.50 x 1023 atoms  Mass of the Al foil = ?

Q: 1.25 moles of PbO2 have a mass of

A: Given  Number of mole of PbO2  = 1.25 mole  Mass = ?

Q: How many prtotons, neutrons and electrons are present in the antimony (III) ion ?    The number of…

A:

Q: The radius of a tungsten atom is 137 pm. How many tungsten atoms would have to be laid side by side…

A: According to the unit conversion, 1 mm is equal to 1×109 pm. The diameter of tungsten is 274 pm.…

Q: Create a timeline using illustrations and text showing elements form with the concept of atomic on…

A: Modern periodic table based on Mendeleev's periodic table is based on the arrangement of elements…

Q: Gaseous butane will react with gaseous oxygen (02) to pr 1.16 g of butane is mixed with 6.9 g of…

A: Given the chemical reaction between butane gas and oxygen gas. The products of the reaction are:…

Q: Calculate the number of atoms in sample. 14.955 g Cr

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: Mass Isotope from the list, and answer the following questions for each term: What familiarity and…

A: The two given terms are  Mass Isotope Dear student since it is a multiple subparts questions,…

Q: When a piece of cadmium (Cd) is placed a solution of nickel chloride (NICI2), the following reaction…

A: Hey, since there are multiple subparts posted, we will answer first eight subparts. If you want any…

Q: how many electrons in bromine

A: We know that Bromine is a chemical element with atomic number 35. The symbol used to denote bromine…

Q: How could a carbon atom could become a nitrogen atom? Explain and be specific in your explanation

A: Nuclear reaction: The given reaction is a nuclear reaction. In the nuclear reaction, one nuclide is…

Q: Calculate the number of atoms in sample. 12.899 g Pt

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: In a neutral atom the number of protons equals

A:

Q: protons and neutrons since they both have a mass of 1 amu. Complete the table to show each…

A:

Q: When an atom has one or more extra ____ it will have a ___ charge

A: An atom has an equal number of electrons and protons. i.e Number of protons= Number of electrons.…

Q: Calculate the mass, in grams

A:

Q: a. How many hydrogen atoms are in the picture? Nitrogen? b. Does the formula indicate how many atoms…

A:

Q: I want to know at least some reason why the mass of the Mgo formed could be lower that expected

A: Interpretation -  To tell about a reason why the mass of the MgO formed could be lower that expected…

Q: use models to study atoms?

A: Atom is defined as the basic building block of matter. All matters in any form either solid ,liquid…

Q: ny atoms c

A:

Q: places explain/ give example. The law of multiple proportions ATOMIC STRUCTURE AND SYMBOLS…

A: The fundamental quantity of compound is element. A compound is made of many such elements that…

Q: atoms

A: it is made of 3 tiny partical  known as electron ,proton and neutron  Neutron  and proton make…

Q: An unknown element (Uk) has three isotopes, seen in the table. One of the percentage values is…

A:

Q: Given Element Your Chosen Element Molecul Chemical ar Name Formul a Name Chemica Valence Name…

A: Solution: The completed table are shown below with details --- Given Element Your Chosen…

Q: 117)In each of the fallowina sets of elements,indicate which elements shows the mast active chemical…

A: Reactivity of element is directly proportional to oxidation potential. (a) Al (b) Na (c) B Position…

Q: Calculate the number of atoms in sample. 39.733 g S

A: Given, Mass of Sulfur = 39.733 g

Q: What is the total net charge on a zwitterion? A) positive, since it contains one + charge. B)…

A: The correct option is (b)  It is because  zwitter ion contain both positive and negative charge i.e…

Q: A sample of aluminum foil contains 8.00×10^23 atoms. What is the mass of the foil? mass of foil…

A: The number of moles for a given compound or a molecule refers to the ratio of its mass to the…

Q: Decide whether each statement is true (T) or false (F). Place your answer in the blank space given.…

A: Scientific theory states that the atoms in today's plastics were parts of microscopic plants and…

Q: What is the average mass of the atoms ? (Copper-63 has a mass of 62.92960 amuamu, and copper-65 has…

A: The average atomic mass of the element is defined as the sum of the mass of all the isotopes present…

Q: Part A:  Pairs of ions are attracted to each other to build an ionic ________ Your answer   Part B:…

A: Ionic compound is formed by attraction of appositely charged ion.

Q: For your research project, you need to use isotopic labels. For this you buy chlorine gas (Cl2) that…

A: The basic constituent of a substance is known as an atom that has a nucleus consisting of protons…

Q: What are the most common charges for magnesium and oxygen?  What would you expect the ratio between…

A: When electrons added to an atom it gets negative charge and when electrons are removed from an atom…

Q: In your own words, explain Why do scientists use models to study atoms? In your own words, explain…

A: Atoms are the smallest part to which elements are divided. Or we can say defining structure of…

Q: Of the remaining two subatomic particles, which do you place second in importance for forming…

A: This question concerns the work done by J.J Thomson. Thomson thought that the electrons are the most…

Q: 41) A teenage child in Wisconsin throws a chunk of sodium metal into a lake consisting of freshwater…

A: Given: mass of sodium = atomic number of fluorine = 9 kg = 9000 g density of water = 1.01 g/mL…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.