The atomic number of sodium is 11 and the mass number of sodium is 24. Mass number is equal to the number of proton and neutron present. Therefore, 12 protons and 12 neutrons are present in sodium.
The total number of protons and neutrons in an atomic nucleus is known as the mass number, often known as the atomic mass number or nucleon number. In atomic mass units, it is roughly equivalent to the atom's atomic mass.
Because it indicates the mass of the entire number of protons and neutrons in an element, the mass number of an element is so termed. The atomic number and atomic mass of an element are often listed in periodic tables, along with the chemical symbols for each element.
The concept of mass number was developed by the brilliant scientist Ernest Rutherford, who in 1911 used the gold foil experiment to break atoms and find the nucleus.
Thus, Na²⁴₁₁ 24 represent the mass number and 11 represent the atomic number.
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B. How can the forces on a space probe be controlled so it will land
on Mars?
O C. What type of substances make up the soil on Mars?
O D. Should the government spend taxpayers' money to send space
probes to Mars?
Answer:A
Explanation: Were there any living organisms is the answer because physics is the study of matter,its motion and behaviour of space and time and some other topics like energy and force.
Answer:
B
Explanation:
Forces and vectors on a probe are a physics thing
a. True
b. False
Answer:
False I took the test
Explanation: