What elements are in the mystery star #15? Helium Hydrogen Sodium Lithium O lithium and helium O hydrogen and sodium O hydrogen and lithium O sodium and lithium

Q: Is the statement consistent with Dalton’s atomic theory as it was originally stated? Why? Sulfur and…

A: Concept introduction: Dalton's atomic theory was the first complete attempt to describe all matter…

Q: Atoms of which element have existed for the longer period of time hydrogen sodium iron iodine

A: A question about stability of atom, which is to be accomplished.

Q: What are the main ideas in Dalton’s atomic theory?

A: Dalton was a well-known experimentalist and his significant studies on behaviours and properties of…

Q: How the number of electrons “owned” by an atom is determined ?

A: The number of electrons owned by an atom is determined by calculating the number of bonds and number…

Q: Fill in the missing information: Symbol Atomic # Mass Number # Protons # Electrons #Neutrons Charge…

A: Since, For the given notation of the element, Number of proton = Atomic number Number of neutron =…

Q: Na CI These 2 elements are in the same Period, what Period would it be? 1 18 2

A: Sodium (Na) electronic configurations [ Ne] 3s1 , Last electron is in  3S ,So principal  quantum…

Q: Consider the atom with the chemical symbol Ru. What would be the mass number for an atom of Ru which…

A: Mass number is  the sum of the numbers of protons and neutrons present in the nucleus of an atom..…

Q: Out of the atomic number, atomic mass number, atomic weight, isotopes which one of these are unique…

A: Atomic number = It is equal to the number of protons present in the nucleus of an atom.Atomic weight…

Q: Which atom has the largest number of neutron

A: Since no options are provided, it is assumed that the largest number of neutrons in an atom in the…

Q: What are the "A" group numbers for Aluminum, Calcium, and Cesium, respectively?

A: In chemistry, a group refers to a column of elements in periodic table. In total there are 18 groups…

Q: An atom with 4 electrons, 4 protons and 8 neutrons has an atomic number of...   Group of answer…

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Q: Consider a sample of antimony collected from a different solar system. The sample contained 45.8…

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Q: What is the element based on this clue: It has 3 shells of e- and 2e- in last shell?

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Q: What is the charge of an element that contains 38 protons, 36 electrons, and 38 neutrons?

A: An atom is mainly composed of three sub-particles; electrons, protons and neutrons. These particles…

Q: What are some elements that have atoms smaller than magnesium? Give at least four examples.

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Q: Two substances are sitting on a lab bench in separate containers, at room temperature. Substance A…

A: Substance A, a non-reactive, colorless gas, could potentially belong to the noble gases group or…

Q: 38 If naturally occurring chromium were made up of only 2 isotopes of Chromium-51 and Chromium-53…

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Q: Calculate the atomic number and atomic mass number for atoms with a- 4 electrons and 2 neutrons b-…

A: no of electron is equal to the number of the proton in a neutral atom.  The atomic number is the no…

Q: what group in the periodic table would an element with atomic number 112 belong?

A: • We need to determine the group in the periodic table would an element with atomic number 112…

Q: According to Coulomb's Law... O The energy between two oppositely charged particles decreases as the…

A: Coulomb's law states that the force of attraction or repulsion between two charged particles is…

Q: Which scientist used alpha particles to determine that atoms are mostly empty space? Rutherford…

A: Scientist Rutherford used alpha particle to determine that atom are mostly empty spaced. So option…

Q: What is difference between Atomic mass & Mass nиmber

A: Atomic mass and Mass number

Q: The nucleus of an atom contains 56 neutrons.  The atom contains 43 electrons.  What element is it…

A: Given, Number of neutrons = 56 Number of electrons = 43 To calculate the mass number and to find…

Q: how to rank the isotopes in order of increasing number of neutrons

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Q: Why are electrons not considered in determining the mass number of an element?

A: Welcome to bartleby !

Q: You have been asked to synthesize a new isotope for cadmium. Which part of the original atom would…

A: Isotopes of an element have the same atomic number but different mass numbers.