Question

complete the following table for neutral elements.

	element symbol	atomic number	mass number	number of protons	number of neutrons	number of electrons
second row			56			26

Explanation:

Step1: Analyze the first row (Atomic Number = 10)

• For a neutral atom, Atomic Number (Z) = Number of Protons = Number of Electrons. So, Number of Protons = 10, Number of Electrons = 10.
• Mass Number (A) = Number of Protons + Number of Neutrons. Given Number of Neutrons = 10, so \( A = 10 + 10 = 20 \).
• The element with Atomic Number 10 is Neon (Ne).

Step2: Analyze the second row (Mass Number = 56, let's find Atomic Number)

• Let's assume the second row is for a different element. Wait, maybe the table has two elements? Wait, the first row: Atomic Number 10, Neutrons 10, so Mass Number 20 (Neon). The second row: Mass Number 56, let's check the last column (Number of Electrons = 26). For neutral atom, Number of Electrons = Number of Protons = Atomic Number. So Atomic Number = 26. Then Number of Protons = 26. Number of Neutrons = Mass Number - Atomic Number = \( 56 - 26 = 30 \). The element with Atomic Number 26 is Iron (Fe).

Step3: Fill the first row (Atomic Number 10)

• Element Symbol: Ne (Neon)
• Mass Number: \( 10 + 10 = 20 \)
• Number of Protons: 10
• Number of Neutrons: 10 (given)
• Number of Electrons: 10 (since neutral)

Step4: Fill the second row (Number of Electrons = 26)

• Atomic Number: 26 (since electrons = protons = atomic number)
• Element Symbol: Fe (Iron)
• Mass Number: 56 (given)
• Number of Protons: 26
• Number of Neutrons: \( 56 - 26 = 30 \)
• Number of Electrons: 26 (given, neutral)

Answer:

Element Symbol	Atomic Number	Mass Number	Number of Protons	Number of Neutrons	Number of Electrons
Fe	26	56	26	30	26