What THREE elements are rare-earth elements? calcium neodymium rhenium niobium samarium thallium europium

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

A: The six chemical elements which are present in the second group of the periodic table are known as…

Q: Neon-22 contains 12 neutrons. It also contains a. 12 protons. b. 10 protons. c. 22 protons. d.…

A: Neon-22 means 22Ne10 where 22 represents the atomic mass of Neon and, 10 is atomic number of Neon

Q: The periodic table is organized into groups and periods of elements. The characteristics of a…

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Q: What element is found in period 4, group 4A? Use the atomic symbol to identify the element.

A: Given : Period of element is 4  Group of element is 4 A.

Q: AVhat is the symbol for an ion with: a. 77 protons, 75 electrons, and 116 neutrons b. 117 protons,…

A: a) Ir2+ b) Ts5+

Q: Complete the following table for two of the naturally occurring isotopes of potassium, which is an…

A: Please find the attached images for answer

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

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

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: 57. Which elements are alkaline earth metals?(a) sodium(b) aluminum(c) calcium(d) barium(e) lithium

A: The elements in the tabular form when arranged on the property of the increasing atomic number order…

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: 4. Identify the following elements as either metal, metalloid, or non-metal: a. Cd b. Br c. Si

A: Given  Element = Cd , Br , Si  Metal , Non metal , Metalloid = ?

Q: Which elements are in the same group helium and hydrogen carbon and oxygen sodium and magnesium…

A: Group: The vertical column of the modern periodic table is known as "Group".

Q: Which of the following element is in period 4 Zr He Ca Bi Ag Ca Bi Ag

A: We know that  the  arrangement of elements in the  respective period of the  periodic table is based…

Q: An element 'A' contains 5 protons, 5 electrons and 6 neutrons. it is a cation of Boron It becomes a…

A: Neutral Boron atom occupies 5th atomic number in the modern periodic table. Which states that it has…

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: Classify each of the following fifth-row elements as a metal, a metalloid, or a nonmetal: (a) Y (b)…

A: The metals are elements that are aligned left side of the periodic table and have a tendency to lose…

Q: 4. 14N and 1C have the same number of A. isotopes. B. protons. C. neutrons. D. electrons.

A: The subscript denotes the atomic number and the superscript denotes atomic mass.

Q: An example of an element is chicken noodle soup powerade air inside a balloon lead pipe baking soda…

A: An element is a pure form of substance in which all atoms have same number of proton so here we see…

Q: Determine the number of protons and neutrons in 18/8 O   Number of Protons  Number of Neutrons…

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Q: Group A column in the periodic table Period Plutonium A main group element Titanium An inner…

A: Given is table.

Q: Complete the following table for two of the naturally occurring isotopes of potassium, which is an…

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Q: what element has 7 protons 8 neutrons and 7 electrons

A: Consider the given element is neutral; the electron and proton number will be same. The mass number…

Q: This group of elements is the most reactive of all the non-metals  A) rare earths B) halogens C)…

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Q: Which of the following isotopes has the highest number of neutrons? 15 7F 17 8.

A: The given options are,

Q: Which element is in Period 2 group 4A? Which element is in Period 4 group 2A

A: In modern periodic table there are 7 horizontal rows which are called periods There are 18 vertical…

Q: Identify the following descriptions as either alkali metal, alkaline metal, transition metal,…

A: a) Transition metal (transition metals having d electrons. Therefore it can show variable charge).…

Q: Name the element which has 26 electrons, 29 electrons, 26 protons

A: General way of element presentation:. AxZ where z is no. Of protons A is no. Of neutrons+protons

Q: Which of the statement is false? O potassium is an alkaline earth metal. O Lithium is an alkali…

A: Given : Statement  To find : False statement

Q: Which element is not a main-group element?a) Se                      b) Mo                     c) Sr…

A: Main-group elements: S-block and P-block elements are knows as main-group elements. They are,…

Q: Which pair of atoms constitutes a pair of isotopes of the same element? O ax 6' 19 19 O b. 10 20X…

A: Isotopes are the species that contains same number of electrons and protons but different number of…

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: Classify each element as a metal or nonmetal. Metal Nonmetal Mg Cr Pt CI Answer Bank

A: All first and second A group elements are metals  D and F block elements are metals  In P block…

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: Classify each of the following fourth-row elements as an alkali metal, an alkaline earth metal, a…

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Q: Give the number of protons, neutrons, and electrons for 5°C0 protons neutrons electrons

A: Given, Element : Cobalt (59Co) Mass number of Co = 59 Atomic number of Co = 27 Number of protons = ?…

Q: For each of the following elements, write its chemical symbol,determine the name of the group to…

A: Element                                          symbol                             group name…

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

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Q: Identify the following elements, giving their name and atomic symbol. a gaseous element in Group…

A: 1) Chlorine Cl atomic number is 17 2) Technitium Tc atomic number is 43

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: 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: An isotope that contains 4 protons, 4 electrons, and 6 neutrons.

A: Atomic number (Z) is equal to number of protons Mass number (A) is the sum of number of protons and…

Q: Specify the number of protons, neutrons, and electrons in the neutral atom iron-56.

A: Atomic number (Z) :-  The number of protons present inside the nucleus of an atom us known as atomic…

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: The most common iso 8 neutrons.

A: The mass of an atom is majorly decided by the number of protons and neutrons present in the nucleus…

Q: Uranium hexafluoride, UF6, is an important compound used in the enrichment of uranium by gaseous…

A: Where uranium can be found on the periodic table ?

Q: MCQ 32: The atom of aluminum (Al) has the number of neutrons (n") A. 13 В. 27 C. 14 D. 13

A: Given the atom of aluminum (Al) we are asked to calculate the number of neutrons in aluminum atom.

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…

Q: Which contains 7 neutrons? B 13 28 Si

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