Write the complete symbol, including mass number and atomic number, for each atom.

Question

Write the complete symbol, including mass number and atomic number, for each atom.

1. an oxygen atom with 10 neutrons:
2. a chromium atom with a mass number of 54:

Answer 1

1). Oxygen symbol is O. O has atomic number 8 meaning it has 8 protons and 8 electrons. The number of neutrons is given as 10, making the mass number (protons + neutrons) equal to 18. This is written as....

¹⁸₈O

2). Chromium symbol is Cr. Cr has atomic number 24 meaning it has 24 protons and 24 electrons. The mass number is given as 54. This is written as ...

⁵⁴₂₄Cr