1.)What is the atomic number for the element that is in group 1A and period 6? 2.) What is the atomic number for the element that is in group 2A and period 5?  3.)What is the atomic number for the element that is in group 4A and period 3?  4.) What is the atomic number for the element that is in group 3B and period 4?

Q: An imaginary element has two naturally occurring isotopes and has an average atomic mass of 150.2…

A: The relative abundance of each isotope is calculated using equation (1) in which mavg is the average…

Q: Element X reacts with chlorine to form a compound with the formula of X2Cl3. This compound contains…

A: Relative atomic mass: Cl = 35.5 g/mol

Q: The mass of 6 million molecules of a diatomic gas is 5.1  × 10-19 kg. What is the atomic mass of the…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: onsider an element which has 4 isotopes.  You need to identify the element using isotopic masses and…

A: Isotopes are those which have the same number of protons, but they have the different number of…

Q: What is the atomic number for the element that is in group IIIA(13) and period 4? Atomic number =…

A:

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

A: Alkaline earth metals are the elements present in the group 2 of the periodic table. Their general…

Q: (a) Describe Rutherford's experiment and how it led to the structure of the atom. How was he able to…

A: a)

Q: How many atoms are contained in a titanium sphere having a diameter of 4.00 mm? The density of…

A: Given : density of titanium = 4.506 g/cm3  And diameter of sphere = 4.00 mm  Since 1 cm = 10 mm…

Q: 1. How many calories are released when 100. g of steam condenses? The heat of condensation for water…

A: Given: Mass of water = 100 g The heat of condensation for water = 540 Cal/g

Q: 3. How many protons (P), neutrons (N) and electrons (e) are present in Os² that has mass number 190…

A: Given that  Atomic no of element = 79

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: 2 of 2 Explain why the atomic mass of an atom is a decimal number and how that value was determined…

A: In periodic table generally atomic masses are in decimal form because we know that almost for every…

Q: Which of the following elements would be classified as a nonmetal? a.) silicon  b.) francium c.)…

A:

Q: 9. What is the atomic number of the atom in the diagram above? 10. What is the atomic mass/mass…

A: Answer:- These questions are answered by using the simple concept of calculation number of protons,…

Q: . An ion has a 3+ charge, 25 electrons, and a mass number of 53. What is the symbol for this…

A:

Q: What is the formula of chromium(VI) oxide?   What is the formula of carbon tetraiodide?

A: We have to predict the formula for the given names

Q: On planet X431A, the isotopes of carbon, C , have the following natural abundances: Abundance (%)…

A: #Q.1: Data given for planet X431A Given the atomic mass of 1st isotope, M1 = 12.000 amu Fractional…

Q: 69 2.47 Gallium has two naturally occurring isotopes, Ga (isotopic mass = 68.9256 amu, abundance…

A:

Q: The elements in Groups 1A(1) and 7A(17) are all quite reactive. What is a major difference between…

A: The elements in Groups 1A(1) and 7A(17) are all quite reactive. What is a major difference between…

Q: Which statement is NOT a part of Dalton's atomic theory? The atoms of each element are unique.…

A: we know dalton's atomic theory According to dalton's theory, all matter, the element or compound and…

Q: Rubidium has two naturally occurring isotopes, from the following data calculate the value of X?…

A:

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: Which statement describes the number of protons in each atom of an element? A:The number of protons…

A: To identify: The statement which describes the number of proton in an atom of an element.

Q: atomic number = 17, atomic mass = 35.45, and symbol = Cl. %3D a. What is the element's name? b. How…

A:

Q: An element has two naturally occurring isotopes. Isotope 1 has a mass of 190.9606 amu and a relative…

A: Since,    Average Atomic mass=Σmass of Isotope×% of Isotope100

Q: 9) If an element has its atomic mass as 24, it can be Magnesium?lf yes? No? What information is…

A: Metal :- which are good conductor of electricity.  Non-metal :- which do not conduct electricity.…

Q: Gallium has an average atomic mass of 69.72 amu and has two common isotopes 69Ga and 71Ga. If the…

A: An atom is the basic and fundamental unit of matter. An atom consists of electron and the nucleus in…

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: Enter your answer in the provided box.   Calculate the atomic weight of the element given the mass…

A: A numerical problem based on nuclear chemistry, which is to be accomplished.

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: The data given is,

Q: Answer the following questions without referring to Table2.1: (a) What are the main subatomic…

A: An atom can be considered as the smallest unit of any matter. An atom is composed of certain…

Q: An unknown element is a mixture of isotopes ¹²⁰X and ¹²²X. The average atomic mass of X is 121.14…

A: Given : Atomic mass of X = 121.14 amu Two naturally occurring isotopes of element are ¹²⁰X and ¹²²X.…

Q: On another planet, the isotopes of titanium have the given natural abundances. Isotope Abundance…

A: Given: The natural abundance and atomic masses of the three isotopes of titanium: We have to…

Q: Element X has two naturally occurring isotopes, 65X (isotopic mass 65.3520 amu, abundance 58.16%)…

A: The average atomic mass is the sum of the mass of the isotopes multiplied by its fraction or…

Q: A bicycle part made of titanium, Ti, has a volume of 32 cm . Titanium has a density of 4.50 g/cm .…

A:

Q: Lithium forms compounds which are used in dry cells, storage batteries, and in high-temperature…

A: Given : Atomic mass of Li = 6.9412 amu Isotopic mass of 6Li isotope = 6.015123 amu  And Isotopic…

Q: Oxygen, whose atomic number is eight, has three stable isotopes: 16O, 17O, and 18O. Explain what…

A:

Q: (a) How many elements are found in period 4 in the periodic table? (b) How many elements are found…

A: a) The fourth period contains 18 elements beginning with potassium and ending with krypton.

Q: Antimony has two naturally occuring isotopes, 121Sb and 123Sb. 121Sb has an atomic mass of 120.9038…

A:

Q: Assume element X has 2 isotopes: X-125 and X-126. For every 100 atoms of X, 30 of them have a mass…

A: Average atomic mass =mass of isotope X fraction abudance of isotope +mass of isotope -2X fraction of…

Q: a. What element has 35 protons? b. What element has 83 electrons? c. What element has 25 protons? d.…

A: Ans a) Element that has 35 protons - Bromine (Br) b) Element that has 83 electrons - Bismuth (Bi) c)…

Q: What is the symbol of the element in Group 4A(14) and Period 2?

A: Given,  Group number of the element = 4A that is 14  And  Period number of the element = 2  What is…

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: Which statement is TRUE? An atom of Carbon-14 contains 6 protons, 8 neutrons, 6 electrons in its…

A:

Q: Chemistry of Mars NASA's 1997 mission to Mars included a small robot, the Sojourner, that analyzed…

A: Given : There are 3 naturally occurring isotopes of MgO. And the abundance data of isotopes are,

Q: A monoatomic ion has a charge of 1+.   This ion has 18 electrons and 20 neutrons.     How many…

A:

Q: Strontium (Sr, atomic number 38, average atomic mass = 87.62) naturally exists as 4 stable isotopes…

A: Strontium-88 is the most abundant. Hence option C is correct.