Question

[ Multiple Choice Questions ]

1.) Electrons, protons and neutrons are also known as
a) primary particles
b) alpha particles
c) fundamental particles
d) all the above

2.) According to Dalton, the smallest particleof matter is a/an
a) molecule
b) compound
c) atom
d) substance

3.) Cathode days consists of
a) protons
b) electrons
c) alpha particles
d) neutrons

4.) A proton is identical to
a) the nucleus of helium
b) the nucleus of a hydrogen atom
c) a molecule of hydrogen
d) an atom of a hydrogen

5.) The value of e/m. of an atom is measured by
a) Millikan
b) JJ. Thomson
c) Dalton
d) Rutherford

6.) Which of the following pairs are isotopes?
a) Oxygen and Ozone
b) Ice and steam
c) Nitric oxide and nitrogen dioxide

7.) For an element with atomic number 19, the 19th electrons will occupy
a) L-shell
b) M-shell
c) N-shell
d) K-shell

8.) The number of electrons in an element with atomic number X and atomic mass Y will be
a) X - Y
b) Y - X
c) X + Y
d) X

9.) A natural phenomena that supports the experimental conclusion that atoms are divisible is
a) allotropy
b) radioactivity
c) cracking
d) none of these

10.) The charge of electron is
a) 1.6 x 10¹⁹ C
b) 1.6 x 10¹⁸ C
c) 1.6 x 10–¹⁸ C
d) 1.6 x 10–¹⁹ C

11.) The mass of electron is
a) 9.1 x 10-³¹g
b) 9.1 x 10-²⁸g
c) 9.1 x 10-³¹kg
d) 9.1 x 10-³⁰kg

12.) Who is associated with the famous oil-drop experiment?
a) Robert Millikan
b) JJ Thomson
c) Robert Boyle
d) none of these

13.) How many electrons are contained in one coulomb?
a) 1.60 x 10¹⁹
b) 6.25 x 10¹⁵
c) 6.25 x 10¹⁸
d) 1.60 x 10¹⁸

14.) Who discovered positive rays in the cathode ray tube itself?
a) Millikan
b) Goldstein
c) Chadwick
d) Thomson

15.) Who is associated with famous scattering experiment?
a) Rutherford
b) Thomson
c) Chadwick
d) Goldstein

~Don't spam~
​​

Answer 1

Answer:

1. quarks particles / atoms

2. atom

3. electrons

4. the nucleus of the hydrogen atom

5. JJ Thomson

6. ice and steam

7. M shell

8. x + y

10. 9.1 × 10 power minus 28

11. 9.1 × 10 power minus 31

12. robert millikan

13. 1.6 × 10 power 19

14. Eugene Goldstein

15. Rutherford ...

Explanation:

the phenomenal

Answer 2

1. ᴘʀɪᴍᴀʀʏ ᴘᴀʀᴛɪᴄʟᴇs.
2. ᴀᴛᴏᴍ.
3. ᴇʟᴇᴄᴛʀᴏɴs.
4. ᴀ ᴍᴏʟᴇᴄᴜʟᴇ ᴏғ ʜʏᴅʀᴏɢᴇɴ.
5. ᴅᴀʟᴛᴏɴ.
6. ᴏxʏɢᴇɴ ᴀɴᴅ ᴏᴢᴏɴᴇ
7. ɴ-sʜᴇʟʟ.
8. x-ʏ
9. ᴀʟʟᴏᴛʀᴏᴘʜʏ.
10. 1.6 x 10_19
11. 9.1 x 10_31 ᴋɢ.
12. ᴊᴊ ᴛʜᴏᴍᴏsᴏɴ.
13. 1.60 x 10 19
14. ɢᴏʟᴅsᴛᴇɪɴ.
15. ᴄʜᴀᴅᴡɪᴄᴋ.

❣ʜᴏᴘᴇ ᴍʏ ᴀɴsᴡᴇʀ ʜᴇʟᴘs ᴜ❣

✌Xx sʜɪᴠɪ Xx✌