Checking understanding of atoms, elements and the periodic table

5 questions

Assessing knowledge of atomic structure, element symbols, and periodic trends.

Questions

1. Which sub‑atomic particle determines the atomic number of an element?
2. What is the correct symbol for the element with atomic number 26?
3. In the periodic table, elements in the same group generally have similar chemical properties.
4. Which of the following statements about isotopes is correct?
5. Which period of the periodic table contains the element chlorine (Cl)?