Question

Write the symbol for every chemical element that has atomic number less than 15 and atomic mass greater than 23.2 u.

Answer 1

The chemical elements with atomic number less than 15 and atomic mass greater than 23.2 u are Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, and Si.

Step-by-step explanation:

To write the symbol for chemical elements with atomic number less than 15 and atomic mass greater than 23.2 u, we need to identify the elements that meet these criteria.

Elements with atomic number less than 15:

• Lithium (Li) - atomic number 3
• Beryllium (Be) - atomic number 4
• Boron (B) - atomic number 5
• Carbon (C) - atomic number 6
• Nitrogen (N) - atomic number 7
• Oxygen (O) - atomic number 8
• Fluorine (F) - atomic number 9
• Neon (Ne) - atomic number 10
• Sodium (Na) - atomic number 11
• Magnesium (Mg) - atomic number 12
• Aluminum (Al) - atomic number 13
• Silicon (Si) - atomic number 14

Elements with atomic mass greater than 23.2 u:

• Magnesium (Mg) - atomic mass 24.3 u
• Aluminum (Al) - atomic mass 26.9 u
• Silicon (Si) - atomic mass 28.1 u

Therefore, the symbols for the chemical elements that meet the given criteria are Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, and Si.