1. How is nuclear composition of an atom expressed?
2. What information is provided by atomic number of an element?
3. What is mass number of an element? How are atomic number and mass number of an element are shown on the symbol of the element?
4. What basic information can be obtained from the atomic number and mass number of the element?
5. How does the electronic configuration of an element explain its chemical reactivity?
6. Why is an atom neutral despite the presence of charged particles in it?
7. The mass number of an element is 23, and it contains 11 electrons.
What is the number of protons and neutrons in it? What is the atomic number of the element?
8. What is covalency? Two hydrogen atoms combine to form a molecule of hydrogen (H).
What is the covalency of H-atoms?
9. Why do the elements containing only one, or seven electrons in their outermost shell show very high chemical reactivity?
2. What information is provided by atomic number of an element?
3. What is mass number of an element? How are atomic number and mass number of an element are shown on the symbol of the element?
4. What basic information can be obtained from the atomic number and mass number of the element?
5. How does the electronic configuration of an element explain its chemical reactivity?
6. Why is an atom neutral despite the presence of charged particles in it?
7. The mass number of an element is 23, and it contains 11 electrons.
What is the number of protons and neutrons in it? What is the atomic number of the element?
8. What is covalency? Two hydrogen atoms combine to form a molecule of hydrogen (H).
What is the covalency of H-atoms?
9. Why do the elements containing only one, or seven electrons in their outermost shell show very high chemical reactivity?
