What is the name of the element that is in group 3A and period 2? fill in the blank 1What is the name of the element that is in group 6A and period 5? fill in the blank 2What is the name of the element that is in group 1B and period 4? fill in the blank 3What is the name of the element that is in group 2A and period 3? fill in the blank 4

Q: An atom of aluminum has 13 protons and an atomic mass of 27 amu. How many electrons will it contain?…

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Q: What THREE elements are rare-earth elements? calcium neodymium rhenium niobium samarium thallium…

A: In the above question the elements which are rare earth metal  among the option provided are…

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

A: The question is based on periodic table. We need to identify the correct element regarding each of…

Q: A neutral atom of aluminum has 14 neutrons and 13 protons. How many electrons does this aluminum…

A: Number of  protons (p) = 13 Number of neutrons (n) = 14 Number of electrons (e) = ?

Q: In a naturally occurring sample, 19.8% of boron atoms have five neutrons and 80.2% have six…

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Q: The element neon has three naturally occurring isotopes. Neon-20 (mass: 19.9924 amu) has a natural…

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Q: Fill in the nine gaps in this table. Element symbol     Ti     Protons   10   Neutrons   12…

A: The number of protons is equal to the number of electrons. Mass number = No of protons + No of…

Q: ganization of the Periodic Table Tamera v Read each description in the first column of the table…

A: The Atomic Number 92 is used for Uranium.  (1) An element in period 2 and group 8A - Group 8A is of…

Q: The element lithium has two stable isotopes, lithium-7 with an atomic mass of 7.0160 u and lithium-6…

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Q: potassium and sulfur Express your answers as ions and chemical formula separated by a commas.…

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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: 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: Does any element with ZS 92 match the description? If you checked yes, give the symbol of an element…

A: The question is based on the concept of periodic table. we have to identify whether element exist…

Q: Three naturally occurring isotopes of an element are shown in the models below. What do the isotopes…

A: Isotopes are the atoms of same element having same atomic number (Z) but different mass number (A).

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

A: Answers to all the parts are given below

Q: Magnesium has three stable isotopes. The most commonly occurring isotope, 24Mg, has an isotopic mass…

A: Average atomic mass of an atom can be calculated using the mass of their isotopes and their…

Q: Consider this ionic isotope. The identity of the element is missing. 39 ? 2+ 20 Which three…

A: The symbol of an element is written as :  AzX  Here , A is mass number.  Z is Atomic number X is…

Q: Which of these pairs of atoms are isotopes? Atom A: 13 protons, 12 neutrons and 12 electrons. Atom…

A: Definition of isotopes =>  Isotopes are those whose atomic number is same (means number of proton…

Q: A sample of lithium consists of 400 atoms. 30 atoms are the isotope Lithium-6 (6.015 amu) and 370…

A: Calculation of average atomic mass using % abundance of isotopes:

Q: An element has several isotopes. The mass number of one of its isotopes is 65 and it has 36 neutrons…

A: The number of protons (P) in the nucleus of the given isotopes is; mass number=n+PP=65-36P=29

Q: Which of the following ideas is NOT part of Dalton's Atomic Theory?

A: Atoms are destroyed during a chemical reaction is not part of Dalton atomic theory.

Q: There are only two naturally-occuring stable isotopes of chlorine. The mass and natural abundance of…

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

Q: Which is the most massive (has highest mass)? An atom of oxygen A proton A molecule of hydrogen A…

A: A proton is a subatomic particle that is present in the nucleus of an atom. The number of protons…

Q: Identify these elements based on their locations in the periodic table. Give the symbol, not the…

A: Symbol of the given locations---

Q: Which of the following were included in Dalton's Atomic Theory but were later shown to be incorrect?…

A: Answer: Dalton's atomic theory states that: 1. Atoms of a given element are identical in size, mass,…

Q: As seen on the periodic table, the element silicon (Si) has an atomic mass of 28.086 amu. This…

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Q: What is the atomic weight for the element that is in group 2A and period 4? What is the atomic…

A: (1) The element in group 2A and period 4 is Calcium whose atomic weight is 20 a.m.u.

Q: 1.)What is the atomic number for the element that is in group 1A and period 6? 2.) What is the…

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Q: There are only two naturally-occuring stable isotopes of chlorine. The mass and natural abundance of…

A: There are only two isotopes of chlorine is present. Chlorine- 35 and chlorine -37  Mass of…

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

A: Note: Group 1A to 8A all have atomic number ⩽92.  Group 1 and 2 constitute the metals: a). Group 1…

Q: The atomic number indicates the total number of neutrons and protons in a nucleus the number of…

A: #1) For an neutral atom        Atomic No. = No. Of protons OR No. Of electrons         mass no. =…

Q: There are two stable isotopes of nitrogen: Nitrogen-14 and Nitrogen-15. Nitrogen-14 has an atomic…

A: Isotope is defined as the atom of same element having same atomic number but different mass number…