Question

Guys i need answers really fast plz help me
1. Describe Bohr’s model of atom
2. If the atomic number of Chlorine atom is 17 and atomic mass is 35.5u, compute the
number of protons, electrons and neutrons.
3. Define atomic number.
4. Define mass number.
5. Calculate the number of neutrons present in the nucleus of an element X which is
represented as 31 15 X.
6. The atomic number of fluorine is 9 and its mass number is 19. What is the number of
neutrons present in its nucleus?
7. Name the particles which determine the mass of an atom.
8. If an atom contains one electron and one proton, will it carry any charge or not? Justify.
9. Write the atomic number, mass number, number of protons, electrons and neutrons for
the first five elements.
10. How did Bohr’s model of atom explain the stability of an atom?

Grade 9 cbse

Answer 1

Answer:

2. 17 protons

18 neutrons

17 electrons

4. number of protons + number of neutrons

6. neutron of fluorine =10

8. no, it doesn't carry any charge because proton is positive and electron is negative, so,+1 -1 = 0

Answer 2

Explanation:

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