Question

Find the element:

1. A group 12 metal that was once used in thermometers, but now it’s know to be poisonous.
2. Has 3 valence electrons and 4 energy levels.
4. The only metalloid with 3 valence electrons.
5. It’s most common isotope has 5 neutrons.

Answer 1

.

Step-by-step explanation:

1. mercury
2. gallium
3. boron
4. beryllium