What atoms are in period 4, group 6A? What atom is in period 2, group 6A?

Q: 1. Changing the number of positively charged protons in the nucleus of an element would form T a) a…

A: 1) an atom consist of positive charge proton , negative charge  electron and neutral neutron  Atomic…

Q: d11 (pm) 7A BA 1A 3A 4A SA 6A 152 112 05 75 73 72 186 160 143 118 110 103 100 98 227 197 135 122 120…

A: In the given question we have to tell the reason why the atomic radius increases as we move down the…

Q: 9. An atom of the isotope chlorine-37 consists of how many protons, neutrons, and electrons? (p =…

A: Formula used: No. Of neutron= mass no. - no. Of proton.

Q: What is the approximate diameter ofthe nucleus in units of pm?

A: Given diameter of nucleus = 10-4 A. 1A = 10-10m. 10-4 A = 10-14 m.

Q: 1. A sample of magnesium has the following isotopic abundances: Isotopic mass (amu) 23.99 24.99…

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Q: Which element is a row 4 noble gas? (a) Ne (b) Br (c) Zr (d) Kr

A: The rows or periods of a periodic table are made up of elements with the same number of electron…

Q: An element 'A' contains 4 protons, 4 electrons and 5 neutrons. it is + 1. It becomes when it has 4…

A: For a neutral atom, the number of electrons or protons is equal to its atomic number. The mass…

Q: 3. Explain the statement , Matter and radiation have “dual nature.”

A: The matter is that substance which has its own mass and occupies some space.Light or radiation are…

Q: Question attached

A: Ans: Rb-85 = 72.17% = 0.7217 * 84.91 amu = 61.2795 Rb-87 = 27.83% = 0.2783 * 86.91 amu = 24.1871

Q: An unknown element has two naturally occurring isotopes. Isotope 1 has a mass of 119.0 amu and an…

A: Average mass of an element is defined as the atomic mass of the element calculated by multiplying…

Q: Calculate the average atomic mass of copper. The percentages denote the relative abundances. Isotope…

A: Average atomic mass (in amu),           = Σ (atomic mass × abundance) of isotopes

Q: What is the atomic number for the element that is in group VIIB(7) and period 4? Atomic number = 25…

A: There are 7 periods and 18 groups in the modern periodic table.  Elements are arranged in order of…

Q: What is the atomic number of the transition metal Gold (Au)?

A: Atomic number of gold is  79

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: What letters are used to designate atomic number and mass number in isotopic notation of atoms?

A: There are different symbols are used to exhibit atomic Number and mass number of atoms. Atomic…

Q: How many protons, neutrons, and electrons are in the following atoms? (a) 84Kr, (b) 200Hg, (c) 59Co,…

A: Given, The mass of Kr (Krypton) = 84 The mass of Hg (Mercury) = 200 The mass of Co (Cobalt) = 59 The…

Q: I would like help with this question please. Thank you in advance!

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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: Q5. Which element is a halogen?(a) Ne (b) O (c) Ca (d) I

A: Halogen belongs to 17 groups of the periodic table. Halogens are gaseous in nature. Halogens are…

Q: Element: Uranium Mass Abundance Abundance Number of Neutrons Number of Name of isotope (amu) (%)…

A:

Q: Calculate the average atomic mass of copper. The percentages denote the relative abundances. Isotope…

A: Calculation of average atomic mass of cu:

Q: What is the difference between atomic number and atomic weight?

A: The atomic number corresponds to the number of protons present in an atom. It is represented by Z.…

Q: Fill in the blanks: (a) The symbol and atomic number of the heaviest alkaline earth metal are ______…

A: Note: Since you have posted a question with multiple subparts, we will solve the first three…

Q: The element lithium has an atomic weight of 6.941 amu. There are only two isotopes of lithium,a6Li…

A:

Q: Atoms Atom Protons Neutrons Electrons 1 10 18 2 10 10 19 11 8 Which two are isotopes of one another?…

A: Isotopes :  Isotopes are atoms of the same element that have same atomic number but different mass…

Q: Element X has 5 isotopes. One of the isotopes has a mass of 120.6 with an abundance of 8.4%. The…

A: Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by…

Q: 4.40 Two isotopes of rubidium occur naturally, Rb and Rb. Which isotope of rubidium is more…

A: Average atomic mass of Rb = 85.47 Let percentage abundance of 85Rb = x and percentage abundance of…

Q: A hypothetical element X is found to have an atomic mass of 37.45 amu. Element X has only two…

A: Given, Atomic mass of element X = 37.45 amu Element X consist of two isotopes- 1. X-37 2. X-38…

Q: One isotope has an atomic weight of 408.5 atm and a percent abundance of 23.0% while the other…

A: To calculate the atomic weight of the element, multiple the percent abundance with respective weight…

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: ... How many protons, electrons and neutrons are in each of the following? a) 37Cl = protons 17,…

A: #(I): In a neutral atom, Number of protons(p) = Number of electrons(e) = Atomic number(Z) Number of…

Q: Element X has 6 isotopes. What is the average atomic mass? =) Isotope 1 has a mass of 88 with a…

A: Data given: Mass of isotope 1, m1 = 88, Relative abundance of isotope 1, r1 = 11% Mass of isotope 2,…

Q: What percent of the total mass of one atom of xenon (mass of one atom = 2.180x10-22g) comes from…

A: Xenon : Symbol : Xe Atomic number : 54 No.of electrons in one Xe atom : 54   Mass  of 54 electrons =…

Q: 2. Which chemical group is being described? (for example IA, transition elements, etc.) a. Family…

A: In the periodic table , Each elements have its own property  Alkali metals are reactive and…

Q: An atom with 30 protons, 30 neutrons and 30 electrons has an atomic number of:     30     27,000…

A:

Q: The CRC Handbook, a reference book for chemistry and physics lists two isotope of Rubidium (Z-37).…

A: Thus if we know % of two isotopes and mass of one, then we can easily predict the mass of another…

Q: All atoms of a given element have the same A) density B) number of neutrons c) mass D) number of…

A: Each element has a unique atomic number

Q: The atomic weight of Chlorine is 35.45 and its naturally occurring isotopes are Cl-35 and Cl-37.…

A:

Q: Rubidium has two naturally occurring isotopes: 85Rb and 87Rb. The natural abundance of 85Rb is…

A: Given,  Rubidium has two naturally occurring isotopes : 85Rb and 87Rb Relative abundance of 85Rb =…

Q: A fictitious element Z has an average atomic mass of 223.67 u.223.67 u. Element Z has two naturally…

A: Given: Atomic mass of element Z = 223.67 u There are only 2 naturally occurring isotopes of element…

Q: 1. The radius of a Cl nucleus is 4.0 fm, and the radius of a Cl atom is 100 pm. (1 fm = 1 x 10-¹5 m;…

A: Radius of Cl nucleus is 4.0 fm And 1 Fm = 10-15 m radius of nucleus = 4 × 10-15m Diameter = 2 ×…

Q: 1. explain the hazards and uses of Carbon-14 (radioactively isotope). 2. Calculate each of the three…

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Q: What is the mass number of an atom which is made up of 38 protons, 52 neutrons and 38 electrons.

A: Mass number = Number of protons + Number of neutrons

Q: An isotope of lead (Pb) has 122 neutrons. The mass number of this isotope is a. 204 b. 82 c. 288…

A: The solution is as follows :

Q: Chlorine has 17 electrons. According to the modern atomic theory, how many electrons are found in n…

A: Modern atomic theory - According to modern atomic theory atoms are made up of or composed of…

Q: An isotope has 16 protons and 18 neutrons. What is the isotopic symbol and what’s the isotopic mass?…

A: Given :-  A) no. of protons = 16  no. of neutrons = 18  B)  No. of protons = 53  no. of neutrons =…

Q: This homework is going to center around a completely made up element - Maplenium. This metal has a…

A: Please find the solution below:

Q: 70 Zn 30

A: The atomic number of an atom is the number of protons present in the atom. For a neutral atom, the…

Group 14 Elements

The following elements come under group 14 of the periodic table.