The atom 139La has _________protons and ____________neutrons.
The atom 139La has _________protons and ____________neutrons.
Homework Answers
Isotope of lanthanam is 57La139 . Hear atomic number is 57 and mass number is 139. Number of protons 57.and number of neutrons=mass number- atomicnumber =139-57 =82
1. An atom has a diameter of 1.50 Å and the nucleus of that atom has...
1. An atom has a diameter of 1.50 Å and the nucleus of that atom has a diameter of 9.00 × 10^− 5 Å . Determine the fraction of the volume of the atom that is taken up by the nucleus. Assume the atom and the nucleus are a sphere. 2. Calculate the density of a proton, given that the mass of a proton is 1.0073 amu and the diameter of a proton is 1.69 × 10^ − 15 m...
An atom with a single electron (i.e. a hydrogen-like atom) has an atomic number Z =...
An atom with a single electron (i.e. a hydrogen-like atom) has an atomic number Z = 3. What is the principal quantum number of the state in which the electron has the same total energy as a ground state electron has in the hydrogen atom?
An atom of bromine has a mass about four times greater than that of an atom...
An atom of bromine has a mass about four times greater than that of an atom of neon. How many grams of neon will contain the same number of atoms as 1,000 g of bromine? An atom of bromine has a mass about four times greater than that of an atom of neon. Which choice makes the correct comparison of the relative numbers of bromine and neon atoms in 1,000 g of each element?
An atom of bromine has a mass about four times greater than that of an atom...
An atom of bromine has a mass about four times greater than that of an atom of neon. Which choice makes the correct comparison of the relative numbers of bromine and neon atoms in 1,000 g of each element? An atom of bromine has a mass about four times greater than that of an atom of neon. Which choice makes the correct comparison of the relative numbers of bromine and neon atoms in 1,000 g of each element?
0 ELECTRONIC STROCTUR Interpreting the electron configuration of a neutral atom A neutral atom has the...
0 ELECTRONIC STROCTUR Interpreting the electron configuration of a neutral atom A neutral atom has the following electron configuration: What is the chemical symbol for the atom? IT11 -p How many electrons does the atom have? How many 1s electrons are in the D atom? Explanation Check
What is the geometry for an atom that has five groups around the central atom? A)...
What is the geometry for an atom that has five groups around the central atom? A) tetrahedral B) square planar C) trigonal bipyramidal D) octahedral
1- an atom has the following chemical symbol: 114Cd a- how many protons does this atom...
1- an atom has the following chemical symbol: 114Cd a- how many protons does this atom have? b- how many neutrons does this atom have? c- how many electrons does this atom have? 2- an ion has 33 protons, 41 neutrons, and 36 electrons a- what is the mass number of this atom? b- what is the symbol for this ion? enter both mass and the atomic number 3- which of these ions has the same number of electrons as...
. A hydrogen atom has angular momentum V12h. Determine the lowest energy state that the atom...
. A hydrogen atom has angular momentum V12h. Determine the lowest energy state that the atom could be in.
An atom has the following chemical symbol. 14N How many protons does this atom have? How...
An atom has the following chemical symbol. 14N How many protons does this atom have? How many neutrons does this atom have? How many electrons does this atom have
Which atom has the greatest nucleophilic strength? Which atom has the greatest nucleophilic strength? :0 :0...
Which atom has the greatest
nucleophilic strength?
Which atom has the greatest nucleophilic strength? :0 :0 : H2 -ΝΗ The nitrogen in the sidechain The nitrogen bonded to the alpha carbon The negatively charged oxygen The pi bonds within the 6-membered ring
An atom with a single electron (i.e. a hydrogen-like atom) has an atomic number Z = 3. What is the principal quantum number of the state in which the electron has the same total energy as a ground state electron has in the hydrogen atom?
An atom of bromine has a mass about four times greater than that of an atom of neon. How many grams of neon will contain the same number of atoms as 1,000 g of bromine? An atom of bromine has a mass about four times greater than that of an atom of neon. Which choice makes the correct comparison of the relative numbers of bromine and neon atoms in 1,000 g of each element?
An atom of bromine has a mass about four times greater than that of an atom of neon. Which choice makes the correct comparison of the relative numbers of bromine and neon atoms in 1,000 g of each element? An atom of bromine has a mass about four times greater than that of an atom of neon. Which choice makes the correct comparison of the relative numbers of bromine and neon atoms in 1,000 g of each element?
0 ELECTRONIC STROCTUR Interpreting the electron configuration of a neutral atom A neutral atom has the following electron configuration: What is the chemical symbol for the atom? IT11 -p How many electrons does the atom have? How many 1s electrons are in the D atom? Explanation Check
. A hydrogen atom has angular momentum V12h. Determine the lowest energy state that the atom could be in.
An atom has the following chemical symbol. 14N How many protons does this atom have? How many neutrons does this atom have? How many electrons does this atom have
Which atom has the greatest
nucleophilic strength?
Which atom has the greatest nucleophilic strength? :0 :0 : H2 -ΝΗ The nitrogen in the sidechain The nitrogen bonded to the alpha carbon The negatively charged oxygen The pi bonds within the 6-membered ring
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