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What is the atomic number of selenium?
Selenium, with the chemical symbol Se, is the chemical element with the atomic number 34.
Atomic number of 30 and 34?
30 is zinc's atomic number. 34 is selenium's.
A sample of Se weighs 20.5 grams will a sample of V that contains the same number of atoms weigh more or less than 20.5 grams?
A sample of Se weighs 20.5 grams. Will a sample of V that contains the same number of atoms weigh more or less than 20.5 grams? (more, less): _______Calculate the mass of a sample of V that contains the same number of atoms. _______ grams of VAnswer:Since the atomic weight of V is smaller than the atomic weight of Se, each atom will have a smallermass, and the sample will weigh less.Since the same number of moles will contain the same number of atoms, regardless of the element, it is only necessary to find the number of moles of Se in the 20.5 gram sample, and then to find the mass of the same number of moles of V.The atomic weight of Se is 79.0 g/mol1. Convert grams of Se to moles of Se:moles Se= 20.5 g Se1 mol = 0.260 mol Se79.0 gMultiply by moles per gram. Grams cancel out.The atomic weight of V is 50.9 g/mol2. To convert 0.260 moles of V to grams of V:grams V = 0.260 mol V50.9 g = 13.2 g V1 molMultiply by grams per mole. Moles cancel out.
In what group is selenium in the periodic table?
Selenium (Se) is in oxygen family (group 16 or VIA) and in 4th period.
Which element has atomic weight of 79?
Selenium (Se) has an atomic weight of 79,04.
What is the atomic number of selenium?
Selenium, with the chemical symbol Se, is the chemical element with the atomic number 34.
Atomic number of 30 and 34?
30 is zinc's atomic number. 34 is selenium's.
What is the number underneath the symbol Se?
Probably the atomic weight, which is 78.96.
How many p electrons does Se atomic number 34 possess?
34. Atomic number equals the number of protons in an atom.
What element has the mass number of 78?
THE ELEMENT WHICH HAVE ATOMIC MASS 78.96 IS SELENIUM OF 6TH GROUP WITH ATOMIC NUMBER 34 AND SYMBOL (Se)
A sample of Se weighs 20.5 grams will a sample of V that contains the same number of atoms weigh more or less than 20.5 grams?
A sample of Se weighs 20.5 grams. Will a sample of V that contains the same number of atoms weigh more or less than 20.5 grams? (more, less): _______Calculate the mass of a sample of V that contains the same number of atoms. _______ grams of VAnswer:Since the atomic weight of V is smaller than the atomic weight of Se, each atom will have a smallermass, and the sample will weigh less.Since the same number of moles will contain the same number of atoms, regardless of the element, it is only necessary to find the number of moles of Se in the 20.5 gram sample, and then to find the mass of the same number of moles of V.The atomic weight of Se is 79.0 g/mol1. Convert grams of Se to moles of Se:moles Se= 20.5 g Se1 mol = 0.260 mol Se79.0 gMultiply by moles per gram. Grams cancel out.The atomic weight of V is 50.9 g/mol2. To convert 0.260 moles of V to grams of V:grams V = 0.260 mol V50.9 g = 13.2 g V1 molMultiply by grams per mole. Moles cancel out.
In what group is selenium in the periodic table?
Selenium (Se) is in oxygen family (group 16 or VIA) and in 4th period.
What is the 34th element on the periodic table?
The element with atomic number 34, selenium.
What number of each sub atomic particle would you find in the Se-80?
34 protons 34 electrons 46 neutrons
What type of nuclear decay results in the atomic number increasing by one with no change in mass?
Beta- decay result in an increase of atomic number by one, with no resulting change in the atomic mass number.There is a change in mass, since an electron and an electron anti-neutrino is emitted, and also because the neutron changes into a proton, but the atomic mass number, per se, does not change.
What is the significance of the atomic number z above each atomic symbol in the periodic table?
The atomic number (Z) above each atomic symbol in the periodic table represents the number of protons in the nucleus of an atom. It determines an element's identity and its unique position in the periodic table. Elements are arranged in increasing atomic number from left to right on the periodic table.
This element has an atomic number that is double the atomic number of silicon?
this elemnt has an atomic number that is double the atomic number of silicon?
