The energy levels of an atom are occupied by electrons. These energy levels are often represented as shells, and each level can hold a specific number of electrons. Electrons are crucial in determining an atom's properties.
The energy levels of an atom are occupied by electrons. An atom's structure consists of a nucleus, which is surrounded by the energy levels. These energy levels, often represented as shells, house the electrons. For example, the first energy level can accommodate up to 2 electrons, while the second energy level can hold up to 8. These electrons play a critical role in determining the physical and chemical properties of atoms and subsequently, the substances they form.
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0.07 mol/L
0.0007 mol/L
0.7 mol/l
Answer:
The molarity of a 50.0 mL solution that contains 0.0350 mol of sodium sulfate 0.7
Explanation:
Molarity is a concentration measure that indicates the amount of moles of solute that appear dissolved in each liter of the mixture.
So, the Molarity of a solution is determined by the expression:
Molarity is expressed in units ().
In this case:
Replacing:
Molarity= 0.7
The molarity of a 50.0 mL solution that contains 0.0350 mol of sodium sulfate 0.7
neutrons
neutrons and electrons
protons and electrons
Answer : The correct option is, neutrons
Explanation :
Isotope : It is defined as the element that have the same number of protons but have the different number of neutrons of each of the atom.
Atomic number is defined as the number of protons or number of electrons.
Atomic number = number of protons = number of electrons
Mass number is defined as the sum of number of protons and number of neutrons.
Number of neutrons = Mass number - Number of protons
For example : Carbon - 13 isotope has mass number = 13, atomic number = 6 and the number of neutrons = 13 - 6 = 7
Hence, the isotopes of the same element have different numbers of neutrons.
Answer:
Gamma radiations, because they have the most energy.
Explanation:
Gamma radiations:
Gamma radiations are high energy radiations having no mass.
These radiations are travel at the speed of light.
Gamma radiations can penetrate into the many materials.
These radiations are also used to treat the cancer.
Lead is used for the protection against gamma radiations because of its high molecular density.
The lead apron are used by the person when treated with gamma radiations.
Lead shields are also used in the wall, windows and doors of the room where gamma radiations are treated, in-order to protect the surroundings.
Answer: C: Gamma rays, because they have the most energy
i took the test this is the correct answer
hope this helps!