Na+has 12 neutrons and 10 electrons. Which of the following statement is correct?a)Na+has atomic number equal to 10 and mass number 22b)Na+has atomic number equal to 11 and mass number 23c)Na+has atomic number equal to 10 and mass number 23d)Na+has atomic number equal to 11 and mass number 22Correct answer is option 'B'. Can you explain this answer?

Question

Answer

The chemical symbol Na⁺ represents a sodium ion. The atomic number of sodium (Na) is 11, which means it has 11 protons.

Given that Na⁺ has 12 neutrons, we can determine the mass number by adding the number of neutrons to the number of protons. So, for Na⁺:

Mass number = Number of neutrons + Number of protons Mass number = 12 neutrons + 11 protons Mass number = 23

The atomic number remains unchanged because it is determined by the number of protons, which is characteristic of each element. The loss or gain of electrons to form ions does not change the atomic number.

Therefore, the correct statement is: Na⁺ has an atomic number equal to 11 and a mass number of 23.

Answer

Option b

Answer

B is the right answer

Answer

Option b is correct because Na cation looses it's one electron which is later added to make 10+1 = 11 electrons or protons along with mass number 11+12= 23.

Answer

Na is the chemical symbol for the element sodium. In order to determine the correct statement about Na's atomic number and mass number, we need to understand the definitions of these terms.

- Atomic number: The atomic number of an element is equal to the number of protons in the nucleus of an atom. It is represented by the symbol 'Z'.

- Mass number: The mass number of an atom is the sum of the number of protons and neutrons in the nucleus. It is represented by the symbol 'A'.

Given information:
- Na has 12 neutrons and 10 electrons.

To determine the atomic number, we need to know the number of protons. Since the number of electrons in an atom is equal to the number of protons, we can conclude that Na has 10 protons.

To find the mass number, we need to add the number of protons and neutrons. In this case, we have 10 protons and 12 neutrons, so the mass number of Na is 10 + 12 = 22.

Now, let's evaluate each option based on the given information and definitions:

a) Na has atomic number equal to 10 and mass number 22
- This option is incorrect because the given information states that Na has 10 electrons, which means it has 10 protons, not atomic number 10.

b) Na has atomic number equal to 11 and mass number 23
- This option is correct. The given information indicates that Na has 10 electrons, which means it has 10 protons, giving it an atomic number of 11. The mass number is calculated by adding the protons (10) and neutrons (12), resulting in a mass number of 22.

c) Na has atomic number equal to 10 and mass number 23
- This option is incorrect because the given information states that Na has 10 electrons, which means it has 10 protons, not atomic number 10.

d) Na has atomic number equal to 11 and mass number 22
- This option is incorrect because the mass number is calculated by adding the protons (10) and neutrons (12), resulting in a mass number of 22, not 23.

In conclusion, the correct statement is option b) Na has atomic number equal to 11 and mass number 23.

Answer

Na(sodium) has atomic no 11 and its mass number is 23...no of neutrons =mass no.-atomic no(23-11=12)..so no of neutrons is 12..and as it is clearly visible that there's a positive charge on Na..which means that it lose 1 electron..that means (11-1) therefore no of electrons becomes 10

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