It is the Sr+2 ion. It is formed by a Sr atom.
121
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Palindrome words: madam, peep, Otto, racecar, rotator Palindrome numbers: 121, 265,562, 74,947, 8,030,308
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Antimony, Sb, has the atomic number 51. The atomic number is the number of protons in the nuclei of all antimony atoms, so Sb atoms have 51 protons. In a neutral atom, the number of protons equals the number of electrons. So Sb atoms also have 51 electrons. Antimony-121 is an isotope of antimony with a mass number of 121. From the mass number, we can subtract the number of protons and get the number of neutrons in the atoms of the 121Sb isotope, which is 121-51 = 70 neutrons.
Atomic weight of mercury is 201 80 protons 80 electrons 121 neutrons Mercury has 7 stable isotopes, with 116, 118, 119, 120, 121, 122 and 124 neutrons. The 116 neturon isotope is pretty rare on Earth (0.15%).
portons 80 neutrons 121 electrons 80
Antimony (symbol Sb) has three isotopes: 121Sb, 123Sb, and 125Sb. The 121 isotope has 70 neutrons, and the 123 isotope has 72 neutrons. The 125 isotope isn't stable and will decay, but it has 74 neutrons.
79 protons, 79 electrons and 118 neutrons. a neutral gold atom has 79 protons about 121 neutrons and 79 electrons
80 protons, 80 electrons, 121 neutrons
Mercury (Hg) can ONLY have 80 protons, or else it cannot be mercury. The difference between its mass number (201) and 80 is 121, which is the number of neutrons. These can vary and are called isotopes. The number of protons can always only be 80 for mercury, tho.
An element with an atomic number of 80 is mercury (Hg). Mercury has 80 protons and approximately 121 neutrons in its most common isotope, mercury-201 (since 201 - 80 = 121 neutrons).
The atomic number of Mercury(Hg) is 80; since atomic number of an atom= No. of protons.Thus No. of protons in Mercury is 80. Also No. of protons = No. of electrons (In an neutral Atom; which is not an ion).Therefore No. of electrons is also 80. Next, Mass number(Atomic Mass) of Mercury is 160. Mass Number(Atomic Mass)= No. of Protons + No. of Neutrons. Hence calculating that we get No. of Neutrons also to be 80. FYI; Electrons have negligible mass so they are not included in calculating Mass of an atom, which only requires the nucleus which contains only protons and neutrons
An element with 21 neutrons would have an atomic number of 11, as the number of protons in an atom determine its atomic number. Therefore, the element would be sodium (Na), which has an atomic number of 11 and typically has 12 neutrons.
The number of electrons in a neutral atom is equal to the number of protons, which is 80 in this case. This is because in a neutral atom, the positive charge of the protons is balanced by the negative charge of the electrons.
121Sb has 71 neutrons. This can be calculated by subtracting the atomic number of antimony (Sb), which is 51, from the mass number, which is 121.