Q.58. A monoatomic anion (A) has 45 neutrons and 36 electrons. Atomic mass, group in the periodic ta

Q: What is the correct answer for this exam Chemistry Q58?

The correct answer is A. Given: Number of neutrons = 45. Number of electrons in anion = 36.Since it's an anion, it has gained electrons. Let the charge be $-z$. So, number of electrons in neutral atom = $36 - z$.The atomic number (Z) is equal to the number of protons in the neutral atom. For a monoatomic anion, the number of electrons is 36. Common monoatomic anions are typically $-1$ or $-2$.If charge is $-1$, then numbe

Q: Q.58. A monoatomic anion (A) has 45 neutrons and 36 electrons. Atomic mass, group in the periodic table and physical state at room temperature of the element (A) respectively are :

The correct answer is A. Given: Number of neutrons = 45. Number of electrons in anion = 36.Since it's an anion, it has gained electrons. Let the charge be $-z$. So, number of electrons in neutral atom = $36 - z$.The atomic number (Z) is equal to the number of protons in the neutral atom. For a monoatomic anion, the number of electrons is 36. Common monoatomic anions are typically $-1$ or $-2$.If charge is $-1$, then numbe

Q: What are the options for this this exam Chemistry question?

A. 80, 17, liquid · B. 81, 16, solid · C. 80, 16, gas · D. 81, 15, gas

Question

Q.58. A monoatomic anion (A) has 45 neutrons and 36 electrons. Atomic mass, group in the periodic table and physical state at room temperature of the element (A) respectively are :

FirstInTest · Accepted Answer

Given: Number of neutrons = 45. Number of electrons in anion = 36.Since it's an anion, it has gained electrons. Let the charge be $-z$. So, number of electrons in neutral atom = $36 - z$.The atomic number (Z) is equal to the number of protons in the neutral atom. For a monoatomic anion, the number of electrons is 36. Common monoatomic anions are typically $-1$ or $-2$.If charge is $-1$, then number of protons = $36-1 = 35$. This corresponds to Bromine (Br).Atomic mass = number of protons + number of neutrons = $35 + 45 = 80$.Bromine (Br) is in Group 17 (Halogens) of the periodic table.At room temperature, Bromine is a liquid.So, the element is Bromine (Br).Atomic mass = 80.Group = 17.Physical state = liquid.This matches option (1).

Answer

80, 17, liquid

Answer

81, 16, solid

Answer

80, 16, gas

Answer

81, 15, gas

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