1-30 atomic number and mass number rounded off
Understand the Problem
The question is asking for the atomic numbers and rounded mass numbers of the first 30 elements in the periodic table. The atomic number represents the number of protons in an atom, while the mass number is the sum of protons and neutrons, which can be rounded to the nearest whole number.
Answer
Atomic number: 1-30, Mass number (rounded): 1-H, 4-He, 7-Li, 9-Be, 11-B, 12-C, 14-N, 16-O, 19-F, 20-Ne, 23-Na, 24-Mg, 27-Al, 28-Si, 31-P, 32-S, 35-Cl, 40-Ar, 39-K, 40-Ca, 45-Sc, 48-Ti, 51-V, 52-Cr, 55-Mn, 56-Fe, 59-Co, 59-Ni, 64-Cu, 65-Zn
The final answer is 1-30 atomic number and mass number rounded off
Answer for screen readers
The final answer is 1-30 atomic number and mass number rounded off
More Information
The atomic number determines the number of protons in an element, and the mass number is the sum of protons and neutrons in the nucleus. Rounding the atomic masses simplifies understanding but can be less precise.
Tips
Make sure to distinguish between atomic mass (a weighted average) and mass number (a whole number).
Sources
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