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Thallium (Tl)
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What is the mass number of Pb82?
An element, such as lead with its 82 protons per atomic nucleus, does not have a mass number, although it does have an average atomic mass, which for lead is 207.2. This is constituted from four lead isotopes that are radioactively stable. The isotopes have mass numbers of 204, 206, 207, and 208.
What the mass percent composition of an element in a molecule?
Percentage composition= (mass of the element/mass of the molecule)*100 The fraction of the molecule's mass that comes from the element's mass
How is the molar mass of an element determined?
the Atomic Mass in g/ml is the molar mass of the element
What is the mass percent composition of an element in a molecule?
Percentage composition= (mass of the element/mass of the molecule)*100 The fraction of the molecule's mass that comes from the element's mass
The molar mass of an element is the mass of one?
the mole of the element
Mass number of thllium?
Thalium is a metal element. Atomic mass of it is 204.
What is the is the atomic mass of thallium?
Thallium is a meta element. Atomic mass of it is 204. Atomic number of it is 81.
How do you calculate the atomic mass of thalium?
Thalium is a meta element. Atomic mass of it is 204. Atomic number of it is 81.
What has a mass of 204?
Thallium (Tl)
Suppose a newly discovered element has three isotopes that occur in nature Assume that these isotopes occurr in equal amounts in nature What will be the average atomic mass of this element?
You would add 200+203+209 and get 612. Then divide 612 by three. (612/3) to get that the average atomic mass is 204.
What is the mass number of Pb82?
An element, such as lead with its 82 protons per atomic nucleus, does not have a mass number, although it does have an average atomic mass, which for lead is 207.2. This is constituted from four lead isotopes that are radioactively stable. The isotopes have mass numbers of 204, 206, 207, and 208.
How many protons are in Lead 204?
This is actually a very, very easy question to answer. Now, all atoms of the same element have the same number of protons. Otherwise, they wouldn't be the same element. For instance, if lead had one more proton, it would be bismuth, a non-toxic shiny metalloid. If it had one less, it would be thallium: a deadly poison which was only recently found. Lead has 82 protons. When the number is given by an element name (e.g. lead-204), it is also showing the atom's nucleus' mass number. Natural lead contains lead-204, lead-206, lead-207, and lead-208. Each of these contains the same number of protons, but different numbers of neutrons, hence the mass difference. To find the number of neutrons, N, we subtract the number of protons, Z, from the mass number, A. So, 204 - 82 = 122. Lead-204 contains 122 neutrons.
What determines an element's mass?
the mass of protons + the mass of neutrons = mass of the element
What element creates Lead when it decays?
Thallium 204 turns into lead.
What do you call the mass of an element?
The mass of an element is known as it's ATOMIC Mass.
What the mass percent composition of an element in a molecule?
Percentage composition= (mass of the element/mass of the molecule)*100 The fraction of the molecule's mass that comes from the element's mass
How is the molar mass of an element determined?
the Atomic Mass in g/ml is the molar mass of the element
