Gallium has an atomic number of 31 and a mass number of 70. Which tableshows the number of protons, neutrons, and electrons in a gallium ion witha +3 charge? *ParticleNumberParticleNumberprotonproton3931Ineutron31neutron39electron36electron31O Option 1Option 2ParticleNumberprotonParticleNumber39neutron31proton31electron39neutron39electron28

We know that the relationship between protons and atomic number Number of protons = Atonic number…

Answered: Gallium has an atomic number of 31 and…

Chemistry In Focus

7th Edition

ISBN:9781337399692

Author:Tro, Nivaldo J.

Publisher:Tro, Nivaldo J.

Chapter3: Atoms And Elements

Section: Chapter Questions

Problem 19E: Give the atomic number (Z) and the mass number (A) for each of the following: a. a carbon atom with...

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2-101 Complete the following table: Symbol Atomic number Atomic weight Mass number # of protons # of neutrons # of electrons H 0 Li 4 3 Al 26 58 78 17 20
2.84 Early attempts to arrange the elements often focused on atomic weight. Mendeleev considered a number of properties in addition to atomic weight, so he realized that some elements seemed out of place when ordered by atomic weight. Using the modern periodic table, identify elements for which Mendeleev must have had to switch the order in order to get the correct sequence of elements.
Verify that the atomic weight of magnesium is 24.31, given the following information: 24Mg, mass = 23.985042 u; percent abundance = 78.99% 25Mg, mass = 24.985837 u; percent abundance = 10.00% 26Mg, mass = 25.982593 u; percent abundance = 11.01%
2-104 The average atomic weight of lithium is 6.941 amu. The two naturally occurring isotopes of lithium have the following masses: 6Li, 6.01512 amu; 7Li, 7.01600 amu. Calculate the percent abundance of 6Li and 7Li in naturally occurring lithium.
Scientists are trying to synthesize elements with more than 114 protons. State the expected atomic number of (a) the newest inert gas. (b) the new element with properties similar to those of the alkaline earth metals. (c) the new element that will behave like the halogens. (d) the new (nontransition) metal whose ion will have a +2 charge. (e) the new element that will start period 8.
Mass spectrometric analysis showed that there are four isotopes of an unknown element having the following masses and abundances: Three elements in the periodic table that have atomic weights near these values are lanthanum (La), atomic number 57, atomic weight 138.9055; cerium (Ce), atomic number 58, atomic weight 140.115; and praseodymium (Pr), atomic number 59, atomic weight 140.9076. Using the data above, calculate the atomic weight, and identify the element if possible.
2.87 What is the heaviest element to have an atomic weight that is roughly twice its atomic number? What does this suggest must he true about the nuclei of atoms with higher atomic numbers?
The element gallium, used in gallium arsenide semiconductors, has an atomic weight of 69.72 amu. There are only two isotopes of gallium, Ga with a mass of 6.9257 amu and Ga with a mass of 70.9249 amu. What are the isotopic abundances of gallium? Gallium melts just above room temperature
Give the atomic number (Z) and the mass number (A) for each of the following: a. a carbon atom with 8 neutrons b. an aluminum atom with 14 neutrons c. an argon atom with 20 neutrons d. a copper atom with 36 neutrons
1. Which is the more abundant isotope of copper, 63Cu or 65Cu? 63Cu 65Cu

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