Asked by Stephanie Pelaez on Apr 29, 2024
Verified
An atom of sodium has an atomic number of 11 and a mass number of 23. How many neutrons does it have?
A) 11
B) 12
C) 23
D) 34
E) 35
Neutrons
Subatomic particles found within the nucleus of an atom, having no electric charge and a mass slightly larger than that of protons.
Atomic Number
The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
Mass Number
The total number of protons and neutrons in the nucleus of an atom, representing the atom's mass.
- Recognize the charges of subatomic particles.
Verified Answer
ZK
Zybrea KnightMay 03, 2024
Final Answer :
B
Explanation :
The atomic number of sodium is 11, which means it has 11 protons.
The mass number is 23, which is equal to the sum of protons and neutrons.
Mass number = protons + neutrons
23 = 11 + neutrons
Neutrons = 23 - 11 = 12
Therefore, the sodium atom has 12 neutrons.
The mass number is 23, which is equal to the sum of protons and neutrons.
Mass number = protons + neutrons
23 = 11 + neutrons
Neutrons = 23 - 11 = 12
Therefore, the sodium atom has 12 neutrons.
Learning Objectives
- Recognize the charges of subatomic particles.