An atom has two valence electrons, but four shells. This element is a member of which group or family? O A. halogen O B. noble gas C. alkaline earth metal O D. alkali metal

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

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Q: Identify the element that fi ts each description. a. an alkali metal in period 6 b. a transition…

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Q: Platinum is a precious metal used in a wide variety of products. Besides fi ne jewelry, platinum is…

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Q: BöhP's model of the structure of the hydrogen atom. More than one selection may be correct.…

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Q: QUESTION 2 The maximum number of electrons that can occupy the 3rd shell (3rd floor) of an atom is…

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Q: A. For the isotope chlorine-37: a. How many protons are in chlorine-37? b. How many neutrons are in…

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Q: 1. A carbon atom with 7 neutrons, and a positive charge. 2. A nitrogen atom with 7 neutrons, 8…

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Q: 12. How many protons, neutrons, and electrons are in the following? a. 1 atom of iodine-127 b. 1…

A: Since we know that  Atomic number = number of proton  Mass number = number of protons + number of…

Q: 47. Of the elements shown in the Periodic Table, which is the most reactive? * III IV V VI VI| Ne I…

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Q: What principle in constructing the periodic table used the atomic number as basis rather than the…

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Q: When J. J. Thomson discovered the electron, what physical property of the electron did he measure?…

A: Millikan discovered the charge of an electron during his oil drop experiment.

Q: Pls answer to all question, they are not that long.

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Q: 37. Which pair of elements have the same valence electron configuration? a. sodium and argon b.…

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Q: Which of these is a FALSE statement about the structure of the atom? a. An atom with equal numbers…

A: 1. Statement should be written about the Structure of the atom.

Q: If two neutral atoms are isotopes of each other, which of the following statements are true. More…

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Q: How many protons and electrons are there in a neutral atom of each of the following elements?a.…

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Q: Which statement is correct? A.Electrons, protons, and neutrons have about the same mass.…

A: This question is base on the masses of electrons ,protons and neutrons.

Q: Which element in each pair is larger? a. bromine and iodine b. carbon and nitrogen c. silicon and…

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Q: Identify each of the following as a metal, a nonmetal, or a metalloid.a. oxygen c. germaniumb.…

A: Each of the following has to be identified as a metal, a nonmetal, or a metalloid.

Q: Choose all of the following that apply to oşmium, Os. a. Metalloid b. Alkali metal Oc. Transition…

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Q: 3. What is the symbol for the element in group 7 and series 5? a. Nb b. Db c. Te . Bh e. None of the…

A: In the periodic table, group 7 elements are Mn, Tc, Re and Bh. In the above elements, Tc is present…

Q: 14. The table shows the number of subatomic particles in Atom X and Atom Z. Atom X Z # of protons #…

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Q: Give the name of the elements in each group of three element symbols. a. Au, At, Ag b. N, Na, Ni c.…

A: The name of the given element symbols in each group has to be given.

Q: B. Use the information provided for each isotope to complete the chart. Atomic Symbol 35C1 88Cr…

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Q: Which Group would this element NOT fit into?

A: 1. Group 1 elements are called alkali metals, Group 4 consist of transition metals like Titanium,…

Q: 12. List 3 things that are wrong with this image Nucleus Electrons 13. What were the 4 ancient…

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Q: The isotope of an unknown element, X_ has a mass number of 77. The most stable ion of this isotope…

A: Number of protons = atomic number  Number of protons = number of electrons (in neutral atom)…

Q: Which statement is correct? Select one: a. Protons are much more massive than neutrons. b. Protons…

A: The given question's answer will be option b)Protons and neutrons have nearly the same mass.

Q: Which of the following atoms would you expect to be smallest in the follow set of elements?   A.K…

A: In the periodic table, left to right size of the atom is decreases and up to down increases. Argon…

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: a. Atomic Number on the Periodic Table b. Positive charge particle located in the nucleus c.…

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Q: for elements (Br, Ca, Fe, Na, S, Si, and Xe) which of the following term(s) apply? a. metal b.…

A: To classify the elements we have see in which block of the periodic table  the given element is…

Q: From the experiments of JJ Thomson, which of the following is not one of his conclusions?   Group of…

A: From the experiments of JJ Thomson, which of the following is not one of his conclusions

Q: J.J. Thomson was able to measure the charge to mass ratio of an electron. To do this he had to…

A: Discovery of electron is done by J.J Thomson using gas chamber.

Q: For each chemical symbol, determine the number of protons and electrons an atom of the element…

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Q: . Isotopes contain different numbers of *       A. electrons       B. neutrons

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Q: Write the element symbol that fi ts each description, using a superscript for the mass number and a…

A: An atom is made of protons, neutrons, and electrons. Protons and neutrons together make the nucleus.…

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: 1. The identity of an element is determined by: a. protons b. neutrons c. electrons d. all of these…

A: Question is based on the concept of atomic structure. We need to identify correct option in each of…

Q: 11. What was Rutherford's contribution to the atomic model? A. Electrons are not bound to the…

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Q: Which of the following statements is true? All isotopes of an element. Lütfen birini seçin: a. have…

A: Introduction There are some cases where atoms of a similar element are generally found to comprise a…

Q: Identify the element fi tting each description. a. an alkali metal in period 4 d. a main group…

A: a. an alkali metal in period 4 : K ( Potassium )   b. a second-row element in group 7A : F (…

Q: In which set of elements would all members be expected to have very similar chemical properties? a.…

A: We have given that   In a periodic table element are arranged in order of increasing atomic number,…

Q: Mark the following statements as true or false. If a statement is false, correct it to make a true…

A: To find: The given statements as true of false