Structure of atom
Assignment question of chapter structure of atom Class 9 science
1. State the law of conservation of mass.
2. Giving an example, illustrate the law of constant proportions.
3. Name the smallest unit of matter. How big such units are?
4. What are isotopes?
5. What are Berzelius atomic symbols?
6. State the Berzelius scheme of writing atomic symbols.
7. What is the definition of an atomic symbol?
8. Write the atomic symbols for the following elements:
Nitrogen, Potassium, Copper, Calcium, Iron, Calcium, Chromium.
9. What is the significance of an atomic symbol?
Assignment 2
1. Who discovered positive (anode) rays?
2. In what way the discharge tube used for producing anode rays differ from that used for producing cathode rays?
3. State the characteristic properties of positive (anode) rays.
4. Who discovered the proton?
5. What is the mass and charge of a proton?
6. What is a neutron? Who discovered neutron?
7. Name three the most important subatomic particles for chemists.
8. Which subatomic particle is not present in a hydrogen (H) atom?
9. Compare mass and charge of a proton, a neutron and an electron.
10. Atom of an element has one electron, one proton and no neutron. Name the element.
11. Write any two observations which support the fact that atoms are divisible.
12. How does a proton differ from an electron?
Assignment question of chapter structure of atom Class 9 science
1. State the law of conservation of mass.
2. Giving an example, illustrate the law of constant proportions.
3. Name the smallest unit of matter. How big such units are?
4. What are isotopes?
5. What are Berzelius atomic symbols?
6. State the Berzelius scheme of writing atomic symbols.
7. What is the definition of an atomic symbol?
8. Write the atomic symbols for the following elements:
Nitrogen, Potassium, Copper, Calcium, Iron, Calcium, Chromium.
9. What is the significance of an atomic symbol?
Assignment 2
1. Who discovered positive (anode) rays?
2. In what way the discharge tube used for producing anode rays differ from that used for producing cathode rays?
3. State the characteristic properties of positive (anode) rays.
4. Who discovered the proton?
5. What is the mass and charge of a proton?
6. What is a neutron? Who discovered neutron?
7. Name three the most important subatomic particles for chemists.
8. Which subatomic particle is not present in a hydrogen (H) atom?
9. Compare mass and charge of a proton, a neutron and an electron.
10. Atom of an element has one electron, one proton and no neutron. Name the element.
11. Write any two observations which support the fact that atoms are divisible.
12. How does a proton differ from an electron?
