true or false (h)  All atoms of the same element have the same number of electrons.  (b) All atoms of the same element have the same number of protons. (m)  The three isotopes of hydrogen (hydrogen­1, hydrogen­2, and hydrogen­3) differ only in the number of neutrons in the nucleus. (a) Matter is divided into elements and pure substances.  (b) Matter is anything that has mass and volume (occupies space).  (c) A mixture is composed of two or more pure substances. (l) The combining ratio of 1:2 in the compound CO2 tells you that this compound is formed by the combination of one gram of carbon with two grams of oxygen

Q: Which of the following is described as a pure substance that consists only of atoms with the same…

A:

Q: Should the elemental symbol for lead be written as Pb or PB? What confusion could arise if the wrong…

A: Elemental symbol for lead is Pb and it should be Pb .

Q: Differentiate between different isotopes of an element?

A: A number of atoms of some elements have been identified, which have the same atomic number but…

Q: Distinguish among the types, locations, and charges of subatomic particles.

A: Protons, neutrons are electrons  that are the three fundamental subatomic particles present in the…

Q: Suppose that green spheres represent bromine atoms, yellow-green spheres represent chlorine atoms,…

A: According to the question, Green spheres represent Chlorine atoms, Yellow-green spheres represent…

Q: 4. If you were given an antique piece of jewelry and you were told that it was made of solid gold,…

A: There are several tests that are used to detect the purity of gold used by jewelry manufacturers…

Q: In the symbol below, x is, A the mass number B the number of electrons the number of neutrons D the…

A: Mass number is the total of number number of protons and neutrons in an atom. Atomic number…

Q: Uranium-235 is used in nuclear fission. Determine the number of protons and the number of neutrons…

A: Atomic symbol of element gives information about the chemical symbol, atomic number and mass number…

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 and compare it with modern periodic…

Q: pretend that an atom has 25 protons, 20 electrons, and 30 neutrons. What is that charge?

A:

Q: In our modern view of matter and energy, is the law of massconservation still relevant to chemical…

A:

Q: 2-81. (*) A 40.0-milligrams sample of the compound X.O, contains 22.5 milligrams of oxygen atoms.…

A: We have a 40 mg of sample  of X4O10, which contain 22.5 mg of oxygen atoms,  We have to calculate…

Q: For each of the elements Na, Ni, Al, P, Cl, and Ar, providethe following information:a. Which are…

A: In the periodic table, elements are arranged as a function of their atomic number. There is a…

Q: Which of the following gases are elements? O NH, O 0, O N,0 Rn Ar O 0, so, O H,S HCN NO NO, O He

A: Elements are the pure substances that are made up of only one kind of atoms, We are given some list…

Q: Suppose that a hypothetical element con- sists of a mixture of two isotopes. One iso- tope, having…

A:

Q: How are isotopes of a particular element alike? How are they different?

A: Isotopes are atoms of the same element that have different numbers of neutrons but the same number…

Q: Write any three differences between metals and non-metals on the basis of chemical properties?

A: Metals: Metals are the majority elements in the periodic table. They include transition metals,…

Q: By one estimate, an electron travels around the nucleus of an atom at a speed of 1.50 x 10^6 m/s.…

A: A) To change m/sec into km/Hr we multipy 18/5 1.5×106×18/5= 5.4×106km/hr

Q: Which element would be expected to have chemical and physical properties closets to those nitrogen(N…

A: sulfur, because it's in the same groupGroups are columns of a periodic table. Both oxygen and sulfur…

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

A: To find: The source of nicotinic acid which is best for use in a multivitamin tablet.

Q: Which of the following scenes illustrate(s) the fact that com-pounds of chlorine (green) and oxygen…

A: Given:-              Which of the following scenes illustrate(s) the fact that com-pounds of…

Q: the history of the discovery of hydrogen and what properties they observed to identify it

A: Position of hydrogen in periodic table:   Hydrogen is regarded as rogue / disputable element because…

Q: A new compound has the empirical formula GaCl2. Thissurprises some chemists who, based on the…

A: The empirical formula of new compound is s GaCl2 . Since gallium is belongs to group 13, it exhibit…

Q: Of the elements Be, C, Cl, Sb, and Cs, which is most likely to be a metalloid?

A:

Q: .What is the difference between the number of electrons in an atom of selenium, Se, and the number…

A: The number of electrons of an atom is equal to the atomic number of that atom. These are the…

Q: Enter the appropriate symbol for an isotope of phosphorus-32 corresponding to the isotope notation…

A: The term isotopes can be defined as the variants of a given chemical element that differ in neutron…

Q: Matter is defined as ....... إجابتك Felite is إجابتك

A: 2. The term matter refers to anything that occupies space and has mass—in other words, the “stuff”…

Q: Based on the following word descriptions, write the formula for each of the indicated substances.a.…

A: A formula of any compound which represents number of the all types of atoms of that compounds…

Q: Which one of the following is the chemical symbol of an atom with 17 protons and 20 neutrons?

A:

Q: Which of the following statements is false? a. The proton and neutron are primarily responsible for…

A: we have to select the false statement

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: Does fluorine, sulfur, and phosphorus represent elements in a group, a period, or neither?

A: We have to explain if fluorine, sulfur and phosphorus represent elements in a group, a period, or…

Q: An unknown particle is caused to move between two electricallycharged plates, as illustrated in…

A: a) The unknown particle present between the two electrically charged particles is hypothesized to be…

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

A:

Q: Identify as true (T) or false (F): | Minerals separating from flowing water as stony deposits…

A: Since you have posted questions with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: What is the chemical symbol of the alkaline earth metal in the same period as chlorine?

A: Given  chemical symbol of the alkaline earth metal in the same period as chlorine

Q: True or false is an atom is the smallest building block of matter

A: False

Q: Protons and electrons have charges of the same magnitude but opposite sign. true or false?

A: A question about charge and magnitude relationship between protons and electrons.

Q: Defend or refute the statement • The separation of a mixture may result in the production of an…

A: Mixture is a composition where two or more different components are mixed . The process of parting…

Q: The elements of group 4A show an interesting change in properties moving down the group. Give the…

A: The name and chemical symbol of each element in the group 4A is to be given and label it as a…

Q: Since 1800, almost 200 sincere but erroneous reports ofthe discovery of new chemical elements have…

A: The chemical element is a substance which cannot decompose further into simpler forms by chemical…

Q: Currently, the atomic mass unit (amu) is based on being exactly one-twelfth the mass of a carbon-12…

A: The mass of an atom is not only due to the sum of the masses of the neutrons, protons and electrons…

Q: Consider the atoms 16O, 18O, 18F, 18Ne, and 20Ne. Some of the following questions may have more than…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Which of the following statements is not true about the element potassium? Group of answer choices…

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

Q: Since different isotopes of the same element have the same chemical behavior, how can they be…

A:

Q: In the laboratory, 2.38g of copper combined with 1.19g of sulfur.  In a duplicate experiment, 4.26g…

A: The mass of the chemical chemical in a given state is equal to the sum of the individual masses of…