Answer:
Lead
Explanation:
One that I know is lead.
Isotopes refer to different forms of the same element having identical number of protons but varying number of neutrons. Examples of isotopes with equal number of protons and neutrons include Carbon-12 and Deuterium. These isotopes, including the unstable ones termed as 'radioactive isotopes', contribute significantly to an element's atomic mass.
Isotopes are alternate forms of the same element that have the same number of protons but a different number of neutrons. When an isotope has the same number of protons and neutrons, it can be found in lighter elements such as carbon and hydrogen. A good example is the isotope Carbon-12 (with six protons and six neutrons) which is a common isotope of carbon found on Earth. Another example is Hydrogen-2 or Deuterium (with one proton and one neutron). This is because the number of protons (also known as the atomic number) identifies an element - regardless of the number of neutrons.
The presence of isotopes is important in elements as they contribute to the overall atomic mass and affect the behavior of the element. For instance, radioactive isotopes, such as Carbon-14, are unstable and can emit subatomic particles or energy to attain a lower potential energy state, which explains why they're used in radioactive dating methods.
It's worth noting that the number of neutrons in an atom can vary and is not necessarily equal to the number of protons, especially in heavier elements.
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Answer:
Boron
Symbol:
B
Boron, symbolized as 'B', is the element located in group 13 and period 2 of the periodic table. It has 3 valence electrons and two shells.
The element in group 13 and period 2 of the periodic table is Boron. In the periodic table, columns represent groups while rows represent periods. The group number corresponds with the number of electrons in the outer shell and the period number represents the number of shells that an atom of the element has. So, an element in group 13 would have 3 valence electrons and in period 2 indicates it has two shells. Therefore, the element is Boron (symbol B).
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B. They are members of the same genus but different species.
C. They are members of the same species but different families.
D. They are members of the same family but different genera.
Answer:
a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction
Answer:
Story in chemical reaction is about the general issue of bond formation and bond breaking where by the energy required to break bond of reactant to form product is called activation energy
Scientist study the whole process and bring law of law conservation of mass,law of definite proportion (Louis proust 1799),law of multiple proportion (Dalton 1803) law of reciprocal proportion(Ritcher1792)
Story about electric current
It's about rate of flow of electric charge in given point
Inshort discovered by the work of Faraday and Alessandro Volta1803italian physics
Answer:
Geiger counter
Explanation:
Came from Google.
Answer:
See the answer and the resolution below
Explanation:
The equation of the decomposition of magnesium carbonate is as follows:
Mg C03 (white solid) ---> C02 (gas) + Mg= (solid)
To calculate the mass of carbon dioxide produced, the weight of 1 mol of this and 1 mol of MgC03 is calculated. Then a simple rule of 3 is made.
Weight 1 mol of MgC03= Weight Mg + Weight C+ 3x(Weight 0)= 24,305g+ 12,017+3x (15,999)= 84, 318g/mol
Weight 1 mol of C02= Weight C + 2x(Weight 0)=12,017+2x (15,999)= 44, 008g/mol
84, 319 g MgC03------44,008g C02
36,0 g MgC03------X= (36,0 g MgC03x44,008g C02)/84, 319 g MgC03= 18,8 g C02