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... that each atom of lead contains 82 protons in its nucleus.

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What is the mass number of an lead atom that has 80 neutrons?

The mass number of an atom is equal to the sum of the number of protons and neutrons in its nucleus. Since lead has an atomic number of 82 (number of protons), if the lead atom has 80 neutrons, then the mass number would be 82 (protons) + 80 (neutrons) = 162.


What one has more mass an atom of gold or lead?

An atom of lead has more mass than an atom of gold. This is because lead has a greater atomic mass than gold, due to the larger number of protons, neutrons, and electrons in a lead atom compared to a gold atom.


Which has more mass an atom of gold or lead?

An atom of lead has more mass than an atom of gold. This is because lead has a higher atomic number than gold, meaning it has more protons and neutrons in its nucleus, resulting in a greater atomic mass.


What has a greater number of atoms a gram of lead or a gram of uranium?

The lead atom is way heavier than the helium atom. We know this by referring to the Periodic Table of Elements. The atomic mass of lead (Pb) is 207, while that of helium (He) is 4. Therefore, we can estimate that an atom of lead is about 50 times heavier than an atom of helium.


Is a lead atom heavier than a helium atom?

Yes, a lead atom is heavier than a helium atom. Lead has an atomic number of 82, while helium has an atomic number of 2. Atomic number represents the number of protons in an atom's nucleus, and since lead has more protons than helium, it is heavier. Additionally, lead has a higher atomic mass (207.2 amu) compared to helium (4.0026 amu), further confirming that lead is indeed heavier than helium.


What is the mass number of lead that has 127 neutrons?

The mass number of an atom is the sum of its protons and neutrons. Lead (Pb) has an atomic number of 82, so it has 82 protons. If it has 127 neutrons, the mass number would be 82 (protons) + 127 (neutrons) = 209.


What do you get when you change the mass number of an atom?

You can't change the mass number of an atom because the mass number is the number of protons which is the atom's atomic number I hope this helped :)


Will kilogram of hydrogen contain more atoms then kilogram of lead?

Yes, because each hydrogen atom has less mass than each lead atom.Yes, because each hydrogen atom has less mass than each lead atom.Yes, because each hydrogen atom has less mass than each lead atom.Yes, because each hydrogen atom has less mass than each lead atom.


What is the mass number of this element Pb 82 207.19?

Lead is a metal element. Atomic Mass number of it is 207.


What is the sum of protons and neutrons in an atom?

Mass number!:)


Mass number used to calculate the number of?

The mass number is used to calculate the number of nucleons in an atom. It represents the sum of protons and neutrons in the nucleus of an atom. By knowing the mass number, one can determine the approximate atomic mass of the atom.


Is atomic number the same as mass number?

Atomic number is the number of protons in the atom; atom mass is the total mass of the atom (usually neglecting the mass of the electrons because they have so little).